Liste complète des publications de Sylvain Clément
2017 |
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| 1. | Guilbert, Alma; Clément, Sylvain; Moroni, Christine A rehabilitation program based on music practice for patients with unilateral spatial neglect: a single-case study Article de journal Dans: Neurocase, 23 (1), p. 12–21, 2017, ISSN: 1355-4794. @article{guilbert_rehabilitation_2017, title = {A rehabilitation program based on music practice for patients with unilateral spatial neglect: a single-case study}, author = {Alma Guilbert and Sylvain Clément and Christine Moroni}, doi = {10.1080/13554794.2016.1265652}, issn = {1355-4794}, year = {2017}, date = {2017-01-01}, journal = {Neurocase}, volume = {23}, number = {1}, pages = {12--21}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
2016 |
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| 2. | Guilbert, Alma; Clément, Sylvain; Moroni, Christine Musical practice as a way to rehabilitate unilateral spatial neglect: A single case study Inproceedings Dans: 2016. @inproceedings{Guilbert2016, title = {Musical practice as a way to rehabilitate unilateral spatial neglect: A single case study}, author = {Alma Guilbert and Sylvain Clément and Christine Moroni}, year = {2016}, date = {2016-03-01}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
| 3. | Guilbert, Alma; Clément, Sylvain; Martin, Yves; Feuillet, Alexia; Moroni, Christine Exogenous orienting of attention in hearing: a virtual reality paradigm to assess auditory attention in neglect patients Article de journal Dans: Exp Brain Res, 234 (10), p. 2893–2903, 2016, ISSN: 0014-4819, 1432-1106. @article{guilbert_exogenous_2016, title = {Exogenous orienting of attention in hearing: a virtual reality paradigm to assess auditory attention in neglect patients}, author = {Alma Guilbert and Sylvain Clément and Yves Martin and Alexia Feuillet and Christine Moroni}, url = {https://link.springer.com/article/10.1007/s00221-016-4691-8}, doi = {10.1007/s00221-016-4691-8}, issn = {0014-4819, 1432-1106}, year = {2016}, date = {2016-01-01}, urldate = {2017-02-27}, journal = {Exp Brain Res}, volume = {234}, number = {10}, pages = {2893--2903}, abstract = {While mechanisms of orienting attention in unilateral spatial neglect (USN) have frequently been studied in the visual domain, these mechanisms remain relatively unexplored in the auditory domain. Our first goal was to replicate Spence and Driver’s (J Exp Psychol Hum 22:1005–1030, 1994) results with a virtual reality paradigm. This paradigm simulated a 3-dimensional auditory space with headphones. Our second aim was to study auditory profiles of orienting attention in USN. In a first experiment, 18 healthy participants performed an auditory cueing spatial paradigm (either a target-detection task or a target-lateralization task). In a second experiment, 14 right-stroke patients (10 with USN and 4 without USN) performed these two same tasks. As in Spence and Driver’s (J Exp Psychol Hum 22:1005–1030, 1994), our first experiment showed that spatial representations are not utilized for the detection of auditory stimuli. However, during the lateralization task, participants were quicker to detect targets preceded by a spatially congruent cue, which suggests that our paradigm could be suitable for studying orienting attention in hearing. Our second experiment found that patients with USN also needed an explicit spatial task to be sensitive to auditory spatial cueing. In the target-lateralization task, they showed effects lateralized only to one side of space, whereas patients without USN did not. Although our paradigm needs replications to better understand orienting attention impairments in hearing in USN, this study could have implications for the development of clinical tasks that could assess auditory spatial attention in USN syndrome.}, keywords = {}, pubstate = {published}, tppubtype = {article} } While mechanisms of orienting attention in unilateral spatial neglect (USN) have frequently been studied in the visual domain, these mechanisms remain relatively unexplored in the auditory domain. Our first goal was to replicate Spence and Driver’s (J Exp Psychol Hum 22:1005–1030, 1994) results with a virtual reality paradigm. This paradigm simulated a 3-dimensional auditory space with headphones. Our second aim was to study auditory profiles of orienting attention in USN. In a first experiment, 18 healthy participants performed an auditory cueing spatial paradigm (either a target-detection task or a target-lateralization task). In a second experiment, 14 right-stroke patients (10 with USN and 4 without USN) performed these two same tasks. As in Spence and Driver’s (J Exp Psychol Hum 22:1005–1030, 1994), our first experiment showed that spatial representations are not utilized for the detection of auditory stimuli. However, during the lateralization task, participants were quicker to detect targets preceded by a spatially congruent cue, which suggests that our paradigm could be suitable for studying orienting attention in hearing. Our second experiment found that patients with USN also needed an explicit spatial task to be sensitive to auditory spatial cueing. In the target-lateralization task, they showed effects lateralized only to one side of space, whereas patients without USN did not. Although our paradigm needs replications to better understand orienting attention impairments in hearing in USN, this study could have implications for the development of clinical tasks that could assess auditory spatial attention in USN syndrome. |
| 4. | Guilbert, Alma; Clément, Sylvain; Senouci, Latifa; Pontzeele, Sylvain; Martin, Yves; Moroni, Christine Auditory lateralisation deficits in neglect patients Article de journal Dans: Neuropsychologia, 85 , p. 177–183, 2016, ISSN: 0028-3932. @article{guilbert_auditory_2016, title = {Auditory lateralisation deficits in neglect patients}, author = {Alma Guilbert and Sylvain Clément and Latifa Senouci and Sylvain Pontzeele and Yves Martin and Christine Moroni}, doi = {10.1016/j.neuropsychologia.2016.03.024}, issn = {0028-3932}, year = {2016}, date = {2016-01-01}, journal = {Neuropsychologia}, volume = {85}, pages = {177--183}, abstract = {Although visual deficits due to unilateral spatial neglect (USN) have been frequently described in the literature, fewer studies have been interested in directional hearing impairment in USN. The aim of this study was to explore sound lateralisation deficits in USN. Using a paradigm inspired by Tanaka et al. (1999), interaural time differences (ITD) were presented over headphones to give the illusion of a leftward or a rightward movement of sound. Participants were asked to respond “right” and “left” as soon as possible to indicate whether they heard the sound moving to the right or to the left side of the auditory space. We additionally adopted a single-case method to analyse the performance of 15 patients with right-hemisphere (RH) stroke and added two additional measures to underline sound lateralisation on the left side and on the right side. We included 15 patients with RH stoke (5 with a severe USN, 5 with a mild USN and 5 without USN) and 11 healthy age-matched participants. We expected to replicate findings of abnormal sound lateralisation in USN. However, although a sound lateralisation deficit was observed in USN, two different deficit profiles were identified. Namely, patients with a severe USN seemed to have left sound lateralisation impairment whereas patients with a mild USN seemed to be more influenced by a systematic bias in auditory representation with respect to body meridian axis (egocentric deviation). This latter profile was unexpected as sounds were manipulated with ITD and, thus, would not be perceived as coming from an external source of the head. Future studies should use this paradigm in order to better understand these two distinct profiles.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Although visual deficits due to unilateral spatial neglect (USN) have been frequently described in the literature, fewer studies have been interested in directional hearing impairment in USN. The aim of this study was to explore sound lateralisation deficits in USN. Using a paradigm inspired by Tanaka et al. (1999), interaural time differences (ITD) were presented over headphones to give the illusion of a leftward or a rightward movement of sound. Participants were asked to respond “right” and “left” as soon as possible to indicate whether they heard the sound moving to the right or to the left side of the auditory space. We additionally adopted a single-case method to analyse the performance of 15 patients with right-hemisphere (RH) stroke and added two additional measures to underline sound lateralisation on the left side and on the right side. We included 15 patients with RH stoke (5 with a severe USN, 5 with a mild USN and 5 without USN) and 11 healthy age-matched participants. We expected to replicate findings of abnormal sound lateralisation in USN. However, although a sound lateralisation deficit was observed in USN, two different deficit profiles were identified. Namely, patients with a severe USN seemed to have left sound lateralisation impairment whereas patients with a mild USN seemed to be more influenced by a systematic bias in auditory representation with respect to body meridian axis (egocentric deviation). This latter profile was unexpected as sounds were manipulated with ITD and, thus, would not be perceived as coming from an external source of the head. Future studies should use this paradigm in order to better understand these two distinct profiles. |
| 5. | Guilbert, Alma; Clément, Sylvain; Moroni, Christine Évaluation de la latéralisation sonore dans la négligence spatiale unilatérale : cas de Mme B Article de journal Dans: Revue de neuropsychologie, 8 (2), p. 118–125, 2016, ISSN: 2101-6739. @article{guilbert_evaluation_2016-1, title = {Évaluation de la latéralisation sonore dans la négligence spatiale unilatérale : cas de Mme B}, author = {Alma Guilbert and Sylvain Clément and Christine Moroni}, url = {http://www.cairn.info/resume.php?ID_ARTICLE=RNE_082_0118}, issn = {2101-6739}, year = {2016}, date = {2016-01-01}, urldate = {2017-02-27}, journal = {Revue de neuropsychologie}, volume = {8}, number = {2}, pages = {118--125}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
2015 |
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| 6. | Guilbert, Alma; Clément, Sylvain; Moroni, Christine La pratique musicale comme outil de rééducation de la négligence spatiale unilatérale 5500 - 5599 Conférence 2015. @conference{Guilbert2015, title = {La pratique musicale comme outil de rééducation de la négligence spatiale unilatérale}, author = {Alma Guilbert and Sylvain Clément and Christine Moroni}, year = {2015}, date = {2015-12-01}, keywords = {}, pubstate = {published}, tppubtype = {conference} } |
| 7. | Planchou, Clément; Clément, Sylvain; Béland, Renée; Cason, Nia; J, Motte; Samson, Séverine Word detection in sung and spoken sentences in children with typical language development or with specific language impairment Article de journal Dans: Advances in Cognitive Psychology, 11 (3), p. 118–135, 2015. @article{planchou_word_2015, title = {Word detection in sung and spoken sentences in children with typical language development or with specific language impairment}, author = {Clément Planchou and Sylvain Clément and Renée Béland and Nia Cason and Motte J and Séverine Samson}, year = {2015}, date = {2015-08-01}, journal = {Advances in Cognitive Psychology}, volume = {11}, number = {3}, pages = {118--135}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 8. | Clément, Sylvain; Planchou, Clément; Béland, Renée; Motte, Jacques; Samson, Séverine Singing abilities in children with Specific Language Impairment (SLI) Article de journal Dans: Frontiers in Psychology, 6 (420), 2015, ISSN: 1664-1078. @article{clement_singing_2015, title = {Singing abilities in children with Specific Language Impairment (SLI)}, author = {Sylvain Clément and Clément Planchou and Renée Béland and Jacques Motte and Séverine Samson}, url = {http://journal.frontiersin.org/article/10.3389/fpsyg.2015.00420/ http://journal.frontiersin.org/article/10.3389/fpsyg.2015.00420}, doi = {10.3389/fpsyg.2015.00420}, issn = {1664-1078}, year = {2015}, date = {2015-07-01}, journal = {Frontiers in Psychology}, volume = {6}, number = {420}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 9. | Guilbert, Alma; Clément, Sylvain; Moroni, Christine Midpoint auditif: évaluation de la négligence spatiale unilatérale en modalité auditive. 5500 - 5599 Conférence 2015. @conference{guilbert_midpoint_2015, title = {Midpoint auditif: évaluation de la négligence spatiale unilatérale en modalité auditive.}, author = {Alma Guilbert and Sylvain Clément and Christine Moroni}, year = {2015}, date = {2015-05-01}, keywords = {}, pubstate = {published}, tppubtype = {conference} } |
| 10. | Samson, Séverine; Clément, Sylvain; Narme, Pauline; Schiaratura, Loris; Ehrlé, Nathalie Efficacy of musical interventions in dementia: methodological requirements of nonpharmacological trials Article de journal Dans: Ann. N.Y. Acad. Sci., 1337 (1), p. 249–255, 2015, ISSN: 1749-6632. @article{samson_efficacy_2015, title = {Efficacy of musical interventions in dementia: methodological requirements of nonpharmacological trials}, author = {Séverine Samson and Sylvain Clément and Pauline Narme and Loris Schiaratura and Nathalie Ehrlé}, url = {http://onlinelibrary.wiley.com/doi/10.1111/nyas.12621/abstract}, doi = {10.1111/nyas.12621}, issn = {1749-6632}, year = {2015}, date = {2015-03-01}, urldate = {2015-04-02}, journal = {Ann. N.Y. Acad. Sci.}, volume = {1337}, number = {1}, pages = {249--255}, abstract = {The management of patients with Alzheimer's disease is a significant public health problem given the limited effectiveness of pharmacological therapies combined with iatrogenic effects of drug treatments in dementia. Consequently, the development of nondrug care, such as musical interventions, has become a necessity. The experimental rigor of studies in this area, however, is often lacking. It is therefore difficult to determine the impact of musical interventions on patients with dementia. As part of a series of studies, we carried out randomized controlled trials to compare the effectiveness of musical activities to other pleasant activities on various functions in patients with severe Alzheimer's disease. The data obtained in these trials are discussed in light of the methodological constraints and requirements specific to these clinical studies. Although the results demonstrate the power of music on the emotional and behavioral status of patients, they also suggest that other pleasant activities (e.g., cooking) are also effective, leaving open the question about the specific benefits of music in patients with dementia. All these findings highlight the promising potential for nonpharmacological treatments to improve the well-being of patients living in residential care and to reduce caregiver burden.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The management of patients with Alzheimer's disease is a significant public health problem given the limited effectiveness of pharmacological therapies combined with iatrogenic effects of drug treatments in dementia. Consequently, the development of nondrug care, such as musical interventions, has become a necessity. The experimental rigor of studies in this area, however, is often lacking. It is therefore difficult to determine the impact of musical interventions on patients with dementia. As part of a series of studies, we carried out randomized controlled trials to compare the effectiveness of musical activities to other pleasant activities on various functions in patients with severe Alzheimer's disease. The data obtained in these trials are discussed in light of the methodological constraints and requirements specific to these clinical studies. Although the results demonstrate the power of music on the emotional and behavioral status of patients, they also suggest that other pleasant activities (e.g., cooking) are also effective, leaving open the question about the specific benefits of music in patients with dementia. All these findings highlight the promising potential for nonpharmacological treatments to improve the well-being of patients living in residential care and to reduce caregiver burden. |
| 11. | Schiaratura, Loris Tamara; Pastena, Angela Di; Askevis-Leherpeux, Françoise; Clément, Sylvain Expression verbale et gestualité dans la maladie d’Alzheimer : une étude en situation d’interaction sociale Article de journal Dans: Gériatrie et Psychologie Neuropsychiatrie du Vieillissement, 13 (1), p. 97–105, 2015, ISSN: 2115-8789. @article{schiaratura_expression_2015, title = {Expression verbale et gestualité dans la maladie d’Alzheimer : une étude en situation d’interaction sociale}, author = {Loris Tamara Schiaratura and Angela Di Pastena and Françoise Askevis-Leherpeux and Sylvain Clément}, url = {http://www.jle.com/fr/revues/gpn/e-docs/expression_verbale_et_gestualite_dans_la_maladie_dalzheimer_une_etude_en_situation_dinteraction_sociale_303972/article.phtml?tab=texte}, doi = {10.1684/pnv.2014.0514}, issn = {2115-8789}, year = {2015}, date = {2015-03-01}, urldate = {2015-04-02}, journal = {Gériatrie et Psychologie Neuropsychiatrie du Vieillissement}, volume = {13}, number = {1}, pages = {97--105}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 12. | Omigie, Diana; Dellacherie, Delphine; Hasboun, Dominique; Clément, Sylvain; Baulac, Michel; Adam, Claude; Samson, Séverine Intracranial markers of emotional valence processing and judgments in music Article de journal Dans: Cogn Neurosci, 6 (1), p. 16–23, 2015, ISSN: 1758-8936. @article{omigie_intracranial_2015, title = {Intracranial markers of emotional valence processing and judgments in music}, author = {Diana Omigie and Delphine Dellacherie and Dominique Hasboun and Sylvain Clément and Michel Baulac and Claude Adam and Séverine Samson}, doi = {10.1080/17588928.2014.988131}, issn = {1758-8936}, year = {2015}, date = {2015-02-01}, journal = {Cogn Neurosci}, volume = {6}, number = {1}, pages = {16--23}, abstract = {The involvement of the amygdala and orbitofrontal cortex in the processing of valenced stimuli is well established. However, less is known about the extent to which activity in these regions reflects a stimulus' physical properties, the individual subjective experience it evokes, or both. We recorded cortical electrical activity from five epileptic patients implanted with depth electrodes for presurgical evaluation while they rated "consonant" and "dissonant" musical chords using a "pleasantness" scale. We compared the pattern of responses in the amygdala and orbitofrontal cortex when trials were sorted by pleasantness judgments relative to when they were sorted by the acoustic properties known to influence emotional reactions to musical chords. This revealed earlier differential activity in the amygdala in the physical properties-based, relative to in the judgment-based, analyses. Thus, our results demonstrate that the amygdala has, first and foremost, a high initial sensitivity to the physical properties of valenced stimuli. The finding that differentiations in the amygdala based on pleasantness ratings had a longer latency suggests that in this structure, mediation of emotional judgment follows accumulation of sensory information. This is in contrast to the orbitofrontal cortex where sensitivity to sensory information did not precede differentiation based on affective judgments.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The involvement of the amygdala and orbitofrontal cortex in the processing of valenced stimuli is well established. However, less is known about the extent to which activity in these regions reflects a stimulus' physical properties, the individual subjective experience it evokes, or both. We recorded cortical electrical activity from five epileptic patients implanted with depth electrodes for presurgical evaluation while they rated "consonant" and "dissonant" musical chords using a "pleasantness" scale. We compared the pattern of responses in the amygdala and orbitofrontal cortex when trials were sorted by pleasantness judgments relative to when they were sorted by the acoustic properties known to influence emotional reactions to musical chords. This revealed earlier differential activity in the amygdala in the physical properties-based, relative to in the judgment-based, analyses. Thus, our results demonstrate that the amygdala has, first and foremost, a high initial sensitivity to the physical properties of valenced stimuli. The finding that differentiations in the amygdala based on pleasantness ratings had a longer latency suggests that in this structure, mediation of emotional judgment follows accumulation of sensory information. This is in contrast to the orbitofrontal cortex where sensitivity to sensory information did not precede differentiation based on affective judgments. |
| 13. | Huijgen, J; Dellacherie, D; Tillmann, B; Clément, S; Bigand, E; Dupont, S; Samson, S The feeling of familiarity for music in patients with a unilateral temporal lobe lesion: a gating study Article de journal Dans: Neuropsychologia, 77 , p. 313–320, 2015. @article{huijgen_feeling_2015, title = {The feeling of familiarity for music in patients with a unilateral temporal lobe lesion: a gating study}, author = {J Huijgen and D Dellacherie and B Tillmann and S Clément and E Bigand and S Dupont and S Samson}, doi = {doi:10.1016/j.neuropsychologia.2015.09.007}, year = {2015}, date = {2015-01-01}, journal = {Neuropsychologia}, volume = {77}, pages = {313--320}, abstract = {Previous research has indicated that the medial temporal lobe (MTL), and more specifically the perirhinal cortex, plays a role in the feeling of familiarity for non-musical stimuli. Here, we examined contribution of the MTL to the feeling of familiarity for music by testing patients with unilateral MTL lesions. We used a gating paradigm: segments of familiar and unfamiliar musical excerpts were played with increasing durations (250, 500, 1000, 2000, 4000 ms and complete excerpts), and participants provided familiarity judgments for each segment. Based on the hypothesis that patients might need longer segments than healthy controls (HC) to identify excerpts as familiar, we examined the onset of the emergence of familiarity in HC, patients with a right MTL resection (RTR), and patients with a left MTL resection (LTR). In contrast to our hypothesis, we found that the feeling of familiarity was relatively spared in patients with a right or left MTL lesion, even for short excerpts. All participants were able to differentiate familiar from unfamiliar excerpts as early as 500 ms, although the difference between familiar and unfamiliar judgements was greater in HC than in patients. These findings suggest that a unilateral MTL lesion does not impair the emergence of the feeling of familiarity. We also assessed whether the dynamics of the musical excerpt (linked to the type and amount of information contained in the excerpts) modulated the onset of the feeling of familiarity in the three groups. The difference between familiar and unfamiliar judgements was greater for high than for low-dynamic excerpts for HC and RTR patients, but not for LTR patients. This indicates that the LTR group did not benefit in the same way from dynamics. Overall, our results imply that the recognition of previously well-learned musical excerpts does not depend on the integrity of either right or the left MTL structures. Patients with a unilateral MTL resection may compensate for the effects of unilateral damage by using the intact contralateral temporal lobe. Moreover, we suggest that remote semantic memory for music might depend more strongly on neocortical structures rather than the MTL.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Previous research has indicated that the medial temporal lobe (MTL), and more specifically the perirhinal cortex, plays a role in the feeling of familiarity for non-musical stimuli. Here, we examined contribution of the MTL to the feeling of familiarity for music by testing patients with unilateral MTL lesions. We used a gating paradigm: segments of familiar and unfamiliar musical excerpts were played with increasing durations (250, 500, 1000, 2000, 4000 ms and complete excerpts), and participants provided familiarity judgments for each segment. Based on the hypothesis that patients might need longer segments than healthy controls (HC) to identify excerpts as familiar, we examined the onset of the emergence of familiarity in HC, patients with a right MTL resection (RTR), and patients with a left MTL resection (LTR). In contrast to our hypothesis, we found that the feeling of familiarity was relatively spared in patients with a right or left MTL lesion, even for short excerpts. All participants were able to differentiate familiar from unfamiliar excerpts as early as 500 ms, although the difference between familiar and unfamiliar judgements was greater in HC than in patients. These findings suggest that a unilateral MTL lesion does not impair the emergence of the feeling of familiarity. We also assessed whether the dynamics of the musical excerpt (linked to the type and amount of information contained in the excerpts) modulated the onset of the feeling of familiarity in the three groups. The difference between familiar and unfamiliar judgements was greater for high than for low-dynamic excerpts for HC and RTR patients, but not for LTR patients. This indicates that the LTR group did not benefit in the same way from dynamics. Overall, our results imply that the recognition of previously well-learned musical excerpts does not depend on the integrity of either right or the left MTL structures. Patients with a unilateral MTL resection may compensate for the effects of unilateral damage by using the intact contralateral temporal lobe. Moreover, we suggest that remote semantic memory for music might depend more strongly on neocortical structures rather than the MTL. |
2014 |
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| 14. | Omigie, Diana; Dellacherie, Delphine; Hasboun, Dominique; George, Nathalie; Clement, Sylvain; Baulac, Michel; Adam, Claude; Samson, Severine An Intracranial EEG Study of the Neural Dynamics of Musical Valence Processing Article de journal Dans: Cereb. Cortex, p. bhu118, 2014, ISSN: 1047-3211, 1460-2199. @article{omigie_intracranial_2014, title = {An Intracranial EEG Study of the Neural Dynamics of Musical Valence Processing}, author = {Diana Omigie and Delphine Dellacherie and Dominique Hasboun and Nathalie George and Sylvain Clement and Michel Baulac and Claude Adam and Severine Samson}, url = {http://cercor.oxfordjournals.org/content/early/2014/06/05/cercor.bhu118}, doi = {10.1093/cercor/bhu118}, issn = {1047-3211, 1460-2199}, year = {2014}, date = {2014-06-01}, urldate = {2015-03-26}, journal = {Cereb. Cortex}, pages = {bhu118}, abstract = {The processing of valence is known to recruit the amygdala, orbitofrontal cortex, and relevant sensory areas. However, how these regions interact remains unclear. We recorded cortical electrical activity from 7 epileptic patients implanted with depth electrodes for presurgical evaluation while they listened to positively and negatively valenced musical chords. Time–frequency analysis suggested a specific role of the orbitofrontal cortex in the processing of positively valenced stimuli while, most importantly, Granger causality analysis revealed that the amygdala tends to drive both the orbitofrontal cortex and the auditory cortex in theta and alpha frequency bands, during the processing of valenced stimuli. Results from the current study show the amygdala to be a critical hub in the emotion processing network: specifically one that influences not only the higher order areas involved in the evaluation of a stimulus's emotional value but also the sensory cortical areas involved in the processing of its low-level acoustic features.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The processing of valence is known to recruit the amygdala, orbitofrontal cortex, and relevant sensory areas. However, how these regions interact remains unclear. We recorded cortical electrical activity from 7 epileptic patients implanted with depth electrodes for presurgical evaluation while they listened to positively and negatively valenced musical chords. Time–frequency analysis suggested a specific role of the orbitofrontal cortex in the processing of positively valenced stimuli while, most importantly, Granger causality analysis revealed that the amygdala tends to drive both the orbitofrontal cortex and the auditory cortex in theta and alpha frequency bands, during the processing of valenced stimuli. Results from the current study show the amygdala to be a critical hub in the emotion processing network: specifically one that influences not only the higher order areas involved in the evaluation of a stimulus's emotional value but also the sensory cortical areas involved in the processing of its low-level acoustic features. |
| 15. | Haj, Mohamad El; Omigie, Diana; Clément, Sylvain Music causes deterioration of source memory: Evidence from normal ageing. Article de journal Dans: Quarterly journal of experimental psychology, (July), p. 1–11, 2014, ISSN: 1747-0226. @article{haj_music_2014, title = {Music causes deterioration of source memory: Evidence from normal ageing.}, author = {Mohamad El Haj and Diana Omigie and Sylvain Clément}, url = {http://www.ncbi.nlm.nih.gov/pubmed/24873685}, doi = {10.1080/17470218.2014.929719}, issn = {1747-0226}, year = {2014}, date = {2014-01-01}, journal = {Quarterly journal of experimental psychology}, number = {July}, pages = {1--11}, abstract = {Previous research has shown that music exposure can impair a wide variety of cognitive and behavioural performance. We investigated whether this is the case for source memory. Forty-one younger adults and 35 healthy elderly were required to retain the location in which pictures of coloured objects were displayed. On a subsequent recognition test they were required to decide whether the objects were displayed in the same location as before or not. Encoding took place (a) in silence, (b) while listening to street noise, or (c) while listening to Vivaldi's "Four Seasons". Recognition always took place during silence. A significant reduction in source memory was observed following music exposure, a reduction that was more pronounced for older adults than for younger adults. This pattern was significantly correlated with performance on an executive binding task. The exposure to music appeared to interfere with binding in working memory, worsening source recall.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Previous research has shown that music exposure can impair a wide variety of cognitive and behavioural performance. We investigated whether this is the case for source memory. Forty-one younger adults and 35 healthy elderly were required to retain the location in which pictures of coloured objects were displayed. On a subsequent recognition test they were required to decide whether the objects were displayed in the same location as before or not. Encoding took place (a) in silence, (b) while listening to street noise, or (c) while listening to Vivaldi's "Four Seasons". Recognition always took place during silence. A significant reduction in source memory was observed following music exposure, a reduction that was more pronounced for older adults than for younger adults. This pattern was significantly correlated with performance on an executive binding task. The exposure to music appeared to interfere with binding in working memory, worsening source recall. |
| 16. | Omigie, Diana; Dellacherie, Delphine; Hasboun, Dominique; Clément, Sylvain; Baulac, Michel; Adam, Claude; Samson, Séverine Intracranial markers of emotional valence processing and judgments in music. Article de journal Dans: Cognitive neuroscience, (December), p. 1–8, 2014, ISSN: 1758-8936. @article{omigie_intracranial_2014-1, title = {Intracranial markers of emotional valence processing and judgments in music.}, author = {Diana Omigie and Delphine Dellacherie and Dominique Hasboun and Sylvain Clément and Michel Baulac and Claude Adam and Séverine Samson}, url = {http://www.ncbi.nlm.nih.gov/pubmed/25496511}, doi = {10.1080/17588928.2014.988131}, issn = {1758-8936}, year = {2014}, date = {2014-01-01}, journal = {Cognitive neuroscience}, number = {December}, pages = {1--8}, abstract = {The involvement of the amygdala and orbitofrontal cortex in the processing of valenced stimuli is well established. However, less is known about the extent to which activity in these regions reflects a stimulus' physical properties, the individual subjective experience it evokes, or both. We recorded cortical electrical activity from five epileptic patients implanted with depth electrodes for presurgical evaluation while they rated "consonant" and "dissonant" musical chords using a "pleasantness" scale. We compared the pattern of responses in the amygdala and orbitofrontal cortex when trials were sorted by pleasantness judgments relative to when they were sorted by the acoustic properties known to influence emotional reactions to musical chords. This revealed earlier differential activity in the amygdala in the physical properties-based, relative to in the judgment-based, analyses. Thus, our results demonstrate that the amygdala has, first and foremost, a high initial sensitivity to the physical properties of valenced stimuli. The finding that differentiations in the amygdala based on pleasantness ratings had a longer latency suggests that in this structure, mediation of emotional judgment follows accumulation of sensory information. This is in contrast to the orbitofrontal cortex where sensitivity to sensory information did not precede differentiation based on affective judgments.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The involvement of the amygdala and orbitofrontal cortex in the processing of valenced stimuli is well established. However, less is known about the extent to which activity in these regions reflects a stimulus' physical properties, the individual subjective experience it evokes, or both. We recorded cortical electrical activity from five epileptic patients implanted with depth electrodes for presurgical evaluation while they rated "consonant" and "dissonant" musical chords using a "pleasantness" scale. We compared the pattern of responses in the amygdala and orbitofrontal cortex when trials were sorted by pleasantness judgments relative to when they were sorted by the acoustic properties known to influence emotional reactions to musical chords. This revealed earlier differential activity in the amygdala in the physical properties-based, relative to in the judgment-based, analyses. Thus, our results demonstrate that the amygdala has, first and foremost, a high initial sensitivity to the physical properties of valenced stimuli. The finding that differentiations in the amygdala based on pleasantness ratings had a longer latency suggests that in this structure, mediation of emotional judgment follows accumulation of sensory information. This is in contrast to the orbitofrontal cortex where sensitivity to sensory information did not precede differentiation based on affective judgments. |
| 17. | Guilbert, Alma; Clément, Sylvain; Moroni, Christine Hearing and music in unilateral spatial neglect neuro-rehabilitation Article de journal Dans: Front Psychol, 5 , p. 1503, 2014, ISSN: 1664-1078. @article{guilbert_hearing_2014, title = {Hearing and music in unilateral spatial neglect neuro-rehabilitation}, author = {Alma Guilbert and Sylvain Clément and Christine Moroni}, doi = {10.3389/fpsyg.2014.01503}, issn = {1664-1078}, year = {2014}, date = {2014-01-01}, journal = {Front Psychol}, volume = {5}, pages = {1503}, abstract = {Unilateral spatial neglect (USN) is an attention deficit in the contralesional side of space which occurs after a cerebral stroke, mainly located in the right hemisphere. USN patients are disabled in all daily activities. USN is an important negative prognostic factor of functional recovery and of socio-professional reinsertion. Thus, patient rehabilitation is a major challenge. As this deficit has been described in many sensory modalities (including hearing), many sensory and poly-sensory rehabilitation methods have been proposed to USN patients. They are mainly based on visual, tactile modalities and on motor abilities. However, these methods appear to be quite task-specific and difficult to transfer to functional activities. Very few studies have focused on the hearing modality and even fewer studies have been conducted in music as a way of improving spatial attention. Therefore, more research on such retraining needs is neccessary in order to make reliable conclusions on its efficiency in long-term rehabilitation. Nevertheless, some evidence suggests that music could be a promising tool to enhance spatial attention and to rehabilitate USN patients. In fact, music is a material closely linked to space, involving common anatomical and functional networks. The present paper aims firstly at briefly reviewing the different procedures of sensory retraining proposed in USN, including auditory retraining, and their limits. Secondly, it aims to present the recent scientific evidence that makes music a good candidate for USN patients' neuro-rehabilitation.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Unilateral spatial neglect (USN) is an attention deficit in the contralesional side of space which occurs after a cerebral stroke, mainly located in the right hemisphere. USN patients are disabled in all daily activities. USN is an important negative prognostic factor of functional recovery and of socio-professional reinsertion. Thus, patient rehabilitation is a major challenge. As this deficit has been described in many sensory modalities (including hearing), many sensory and poly-sensory rehabilitation methods have been proposed to USN patients. They are mainly based on visual, tactile modalities and on motor abilities. However, these methods appear to be quite task-specific and difficult to transfer to functional activities. Very few studies have focused on the hearing modality and even fewer studies have been conducted in music as a way of improving spatial attention. Therefore, more research on such retraining needs is neccessary in order to make reliable conclusions on its efficiency in long-term rehabilitation. Nevertheless, some evidence suggests that music could be a promising tool to enhance spatial attention and to rehabilitate USN patients. In fact, music is a material closely linked to space, involving common anatomical and functional networks. The present paper aims firstly at briefly reviewing the different procedures of sensory retraining proposed in USN, including auditory retraining, and their limits. Secondly, it aims to present the recent scientific evidence that makes music a good candidate for USN patients' neuro-rehabilitation. |
| 18. | Narme, Pauline; Clément, Sylvain; Ehrlé, Nathalie; Schiaratura, Loris; Vachez, Sylvie; Courtaigne, Bruno; Munsch, Frédéric; Samson, Séverine Efficacy of musical interventions in dementia: evidence from a randomized controlled trial Article de journal Dans: J. Alzheimers Dis., 38 (2), p. 359–369, 2014, ISSN: 1875-8908. @article{narme_efficacy_2014, title = {Efficacy of musical interventions in dementia: evidence from a randomized controlled trial}, author = {Pauline Narme and Sylvain Clément and Nathalie Ehrlé and Loris Schiaratura and Sylvie Vachez and Bruno Courtaigne and Frédéric Munsch and Séverine Samson}, doi = {10.3233/JAD-130893}, issn = {1875-8908}, year = {2014}, date = {2014-01-01}, journal = {J. Alzheimers Dis.}, volume = {38}, number = {2}, pages = {359--369}, abstract = {Although musical interventions have recently gained popularity as a non-pharmacological treatment in dementia, there is still insufficient evidence of their effectiveness. To investigate this issue, a single-center randomized controlled trial was conducted with forty-eight patients with Alzheimer's disease or mixed dementia to compare the effects of music versus cooking interventions in the emotional, cognitive, and behavioral domain, as well as on professional caregiver distress. Each intervention lasted four weeks (two one-hour sessions a week). Multi-component evaluations (with blind assessors) were conducted before, during, and after the interventions to assess their short and long-term effects (up to four weeks post interventions). Analyses revealed that both music and cooking interventions led to positive changes in the patients' emotional state and decreased the severity of their behavioral disorders, as well as reduced caregiver distress. However, no benefit on the cognitive status of the patients was seen. While results did not demonstrate a specific benefit of music on any of the considered measures, the present study suggests the efficacy of two pleasant non-pharmacological treatments in patients with moderate to severe dementia. Our findings highlight the potential of such interventions in improving the well-being of patients living in residential care, as well as reducing caregiver distress.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Although musical interventions have recently gained popularity as a non-pharmacological treatment in dementia, there is still insufficient evidence of their effectiveness. To investigate this issue, a single-center randomized controlled trial was conducted with forty-eight patients with Alzheimer's disease or mixed dementia to compare the effects of music versus cooking interventions in the emotional, cognitive, and behavioral domain, as well as on professional caregiver distress. Each intervention lasted four weeks (two one-hour sessions a week). Multi-component evaluations (with blind assessors) were conducted before, during, and after the interventions to assess their short and long-term effects (up to four weeks post interventions). Analyses revealed that both music and cooking interventions led to positive changes in the patients' emotional state and decreased the severity of their behavioral disorders, as well as reduced caregiver distress. However, no benefit on the cognitive status of the patients was seen. While results did not demonstrate a specific benefit of music on any of the considered measures, the present study suggests the efficacy of two pleasant non-pharmacological treatments in patients with moderate to severe dementia. Our findings highlight the potential of such interventions in improving the well-being of patients living in residential care, as well as reducing caregiver distress. |
2013 |
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| 19. | Guilbert, Alma; Feuillet, Alexia; Clément, Sylvain; Moroni, Christine Orientations exogène et endogène de l'attention en modalités visuelle et auditive dans la négligence spatiale unilatérale 5500 - 5599 Conférence 2013. @conference{guilbert_orientations_2013, title = {Orientations exogène et endogène de l'attention en modalités visuelle et auditive dans la négligence spatiale unilatérale}, author = {Alma Guilbert and Alexia Feuillet and Sylvain Clément and Christine Moroni}, year = {2013}, date = {2013-12-01}, keywords = {}, pubstate = {published}, tppubtype = {conference} } |
| 20. | Guilbert, Alma; Clément, Sylvain; Séverine, Samson; Moroni, Christine Musical practice as rehabilitation method in unilateral spatial neglect 5500 - 5599 Conférence 2013. @conference{Guilbert2013, title = {Musical practice as rehabilitation method in unilateral spatial neglect}, author = {Alma Guilbert and Sylvain Clément and Samson Séverine and Christine Moroni}, year = {2013}, date = {2013-09-01}, keywords = {}, pubstate = {published}, tppubtype = {conference} } |
| 21. | Haj, Mohamad El; Clément, Sylvain; Fasotti, Luciano; Allain, Philippe Effects of music on autobiographical verbal narration in Alzheimer's disease Article de journal Dans: Journal of Neurolinguistics, 26 (6), p. 691–700, 2013, ISSN: 09116044. @article{haj_effects_2013, title = {Effects of music on autobiographical verbal narration in Alzheimer's disease}, author = {Mohamad El Haj and Sylvain Clément and Luciano Fasotti and Philippe Allain}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0911604413000444}, doi = {10.1016/j.jneuroling.2013.06.001}, issn = {09116044}, year = {2013}, date = {2013-01-01}, journal = {Journal of Neurolinguistics}, volume = {26}, number = {6}, pages = {691--700}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 22. | Guetin, Stéphane; Charras, Kevin; Berard, Alain; Arbus, Christophe; Berthelon, Patrick; Blanc, Frédéric; Blayac, Jean-pierre; Bonte, Florence; Bouceffa, Jean-paul; Clement, Sylvain; Ducourneau, Gérard; Gzil, Fabrice; Laeng, Nathalie; Lecourt, Edith; Ledoux, Sylvie; Platel, Hervé; Thomas-Anterion, Catherine; Touchon, Jacques; Vrait, François-xavier; Leger, Jean-marie An overview of the use of music therapy in the context of alzheimer's disease: a report of a french expert group Article de journal Dans: Dementia, 12 (5), p. 619–634, 2013, ISSN: 1741-2684. @article{guetin_overview_2013, title = {An overview of the use of music therapy in the context of alzheimer's disease: a report of a french expert group}, author = {Stéphane Guetin and Kevin Charras and Alain Berard and Christophe Arbus and Patrick Berthelon and Frédéric Blanc and Jean-pierre Blayac and Florence Bonte and Jean-paul Bouceffa and Sylvain Clement and Gérard Ducourneau and Fabrice Gzil and Nathalie Laeng and Edith Lecourt and Sylvie Ledoux and Hervé Platel and Catherine Thomas-Anterion and Jacques Touchon and François-xavier Vrait and Jean-marie Leger}, url = {http://www.ncbi.nlm.nih.gov/pubmed/24337333 http://dem.sagepub.com/content/early/2012/03/28/1471301212438290.abstract}, doi = {10.1177/1471301212438290}, issn = {1741-2684}, year = {2013}, date = {2013-01-01}, journal = {Dementia}, volume = {12}, number = {5}, pages = {619--634}, abstract = {Objectives: The aim of this overview is to present the developments of music therapy in France, its techniques, mechanisms and principal indications, mainly in the context of Alzheimer's disease.Methods: An international review of the literature on music therapy applied to Alzheimer's disease was conducted using the principal scientific search engines. A work group of experts in music therapy and psychosocial techniques then considered the different points highlighted in the review of literature and discussed them.Results and Discussion: Clinical and neurophysiological studies have enlightened some positive benefits of music in providing support for people with Alzheimer's disease or related disorders. Music therapy acts mainly through emotional and psycho-physiological pathways. It includes a series of techniques that can respond to targeted therapeutic objectives. Some studies have shown that music therapy reduces anxiety, alleviates periods of depression and aggressive behaviour and thus significantly improves mood, communication and autonomy of patients.Conclusion: Psychosocial interventions, such as music therapy, can contribute to maintain or rehabilitate functional cognitive and sensory abilities, as well as emotional and social skills and to reduce the severity of some behavioural disorders.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Objectives: The aim of this overview is to present the developments of music therapy in France, its techniques, mechanisms and principal indications, mainly in the context of Alzheimer's disease.Methods: An international review of the literature on music therapy applied to Alzheimer's disease was conducted using the principal scientific search engines. A work group of experts in music therapy and psychosocial techniques then considered the different points highlighted in the review of literature and discussed them.Results and Discussion: Clinical and neurophysiological studies have enlightened some positive benefits of music in providing support for people with Alzheimer's disease or related disorders. Music therapy acts mainly through emotional and psycho-physiological pathways. It includes a series of techniques that can respond to targeted therapeutic objectives. Some studies have shown that music therapy reduces anxiety, alleviates periods of depression and aggressive behaviour and thus significantly improves mood, communication and autonomy of patients.Conclusion: Psychosocial interventions, such as music therapy, can contribute to maintain or rehabilitate functional cognitive and sensory abilities, as well as emotional and social skills and to reduce the severity of some behavioural disorders. |
2012 |
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| 23. | Narme, Pauline; Tonini, Audrey; Khatir, Fatiha; Schiaratura, Loris; Clément, Sylvain; Samson, Séverine [Non pharmacological treatment for Alzheimer's disease: comparison between musical and non-musical interventions] Article de journal Dans: Geriatr Psychol Neuropsychiatr Vieil, 10 (2), p. 215–224, 2012, ISSN: 2115-7863. @article{narme_[non_2012, title = {[Non pharmacological treatment for Alzheimer's disease: comparison between musical and non-musical interventions]}, author = {Pauline Narme and Audrey Tonini and Fatiha Khatir and Loris Schiaratura and Sylvain Clément and Séverine Samson}, doi = {10.1684/pnv.2012.0343}, issn = {2115-7863}, year = {2012}, date = {2012-06-01}, journal = {Geriatr Psychol Neuropsychiatr Vieil}, volume = {10}, number = {2}, pages = {215--224}, abstract = {On account of the limited effectiveness of pharmacological treatments in Alzheimer's disease (AD), there is a growing interest on nonpharmacological treatments, including musical intervention. Despite the large number of studies showing the multiple benefits of music on behavioral, emotional and cognitive disorders of patients with AD, only a few of them used a rigorous method. Finally, the specificity of musical as compared to non-musical and pleasant interventions has rarely been addressed. To investigate this issue, two randomized controlled trials were conducted contrasting the effects of musical to painting (Study 1) or cooking (Study 2) interventions on emotional state of 33 patients with AD. The patients' emotional state was assessed by analyzing professional caregivers' judgments of the patient's mood, then facial expressions and valence of the discourse from short-filmed interviews. In the first study (n=22), each intervention lasted 3 weeks (two sessions per week) and the patients' emotional state was assessed before, during and after intervention periods. After the interventions, the results showed that facial expression, discourse content and mood assessment improved (more positive than negative expressions) as compared to pre-intervention assessment. However, musical intervention was more effective and had longer effects as compared with painting. In the second study (n=11), we further examined long lasting effects of music as compared to cooking by adding evaluation of the patients' emotional state 2 and 4 weeks after the last intervention. Again, music was more effective to improve the emotional state. Music had positive effects that remained significant up to 4 weeks after the intervention, while cooking only produced short-term effect on mood. In both studies, benefits were significant in more than 80% of patients. Taken together, these findings show that music intervention has specific effects on patients' emotional well being, offering promising methods to improve the quality of life of patients with AD.}, keywords = {}, pubstate = {published}, tppubtype = {article} } On account of the limited effectiveness of pharmacological treatments in Alzheimer's disease (AD), there is a growing interest on nonpharmacological treatments, including musical intervention. Despite the large number of studies showing the multiple benefits of music on behavioral, emotional and cognitive disorders of patients with AD, only a few of them used a rigorous method. Finally, the specificity of musical as compared to non-musical and pleasant interventions has rarely been addressed. To investigate this issue, two randomized controlled trials were conducted contrasting the effects of musical to painting (Study 1) or cooking (Study 2) interventions on emotional state of 33 patients with AD. The patients' emotional state was assessed by analyzing professional caregivers' judgments of the patient's mood, then facial expressions and valence of the discourse from short-filmed interviews. In the first study (n=22), each intervention lasted 3 weeks (two sessions per week) and the patients' emotional state was assessed before, during and after intervention periods. After the interventions, the results showed that facial expression, discourse content and mood assessment improved (more positive than negative expressions) as compared to pre-intervention assessment. However, musical intervention was more effective and had longer effects as compared with painting. In the second study (n=11), we further examined long lasting effects of music as compared to cooking by adding evaluation of the patients' emotional state 2 and 4 weeks after the last intervention. Again, music was more effective to improve the emotional state. Music had positive effects that remained significant up to 4 weeks after the intervention, while cooking only produced short-term effect on mood. In both studies, benefits were significant in more than 80% of patients. Taken together, these findings show that music intervention has specific effects on patients' emotional well being, offering promising methods to improve the quality of life of patients with AD. |
| 24. | Samson, Séverine; Baird, Amee; Moussard, Aline; Clément, Sylvain Does Pathological Aging Affect Musical Learning and Memory? Article de journal Dans: Music Perception: An Interdisciplinary Journal, 29 (5), p. 493–500, 2012, ISSN: 0730-7829. @article{samson_does_2012, title = {Does Pathological Aging Affect Musical Learning and Memory?}, author = {Séverine Samson and Amee Baird and Aline Moussard and Sylvain Clément}, url = {http://www.jstor.org/stable/10.1525/mp.2012.29.5.493}, doi = {10.1525/mp.2012.29.5.493}, issn = {0730-7829}, year = {2012}, date = {2012-01-01}, urldate = {2015-03-26}, journal = {Music Perception: An Interdisciplinary Journal}, volume = {29}, number = {5}, pages = {493--500}, abstract = {the effect of pathological aging on explicit memory is very well documented, but relatively few studies have addressed this issue in the musical domain. To examine learning and consolidation of melodies, we designed a melodic recognition task involving immediate and delayed recognition of 16 target melodies (8 familiar and 8 unfamiliar). Seventeen patients with mild to moderate Alzheimer's disease (AD) and 17 age-matched controls were tested. During the initial presentation of the targets, the participant had to decide whether or not the melody was familiar. Recognition was tested after one and three presentations of the target melodies using a yes/no recognition paradigm. Delayed recognition was tested after 24 hours to evaluate consolidation. In keeping with the findings of Bartlett, Halpern, and Dowling (1995), age-matched controls showed better recognition of familiar than unfamiliar melodies. Controls also showed improved performance with multiple presentations for both familiar and unfamiliar melodies, without forgetting after 24-hour delay. In contrast, patients with AD showed impaired learning and recognition of both unfamiliar and familiar melodies with no benefit of familiarity on recognition. Nevertheless, the familiarity decision-based ratings of patients was in keeping with controls. These findings suggest that musical recognition memory is impaired in AD, but the musical lexicon (as assessed by familiarity ratings) is preserved. These findings highlight the need to use both familiar and unfamiliar music in experimental tasks to study the different processes underlying recognition memory.}, keywords = {}, pubstate = {published}, tppubtype = {article} } the effect of pathological aging on explicit memory is very well documented, but relatively few studies have addressed this issue in the musical domain. To examine learning and consolidation of melodies, we designed a melodic recognition task involving immediate and delayed recognition of 16 target melodies (8 familiar and 8 unfamiliar). Seventeen patients with mild to moderate Alzheimer's disease (AD) and 17 age-matched controls were tested. During the initial presentation of the targets, the participant had to decide whether or not the melody was familiar. Recognition was tested after one and three presentations of the target melodies using a yes/no recognition paradigm. Delayed recognition was tested after 24 hours to evaluate consolidation. In keeping with the findings of Bartlett, Halpern, and Dowling (1995), age-matched controls showed better recognition of familiar than unfamiliar melodies. Controls also showed improved performance with multiple presentations for both familiar and unfamiliar melodies, without forgetting after 24-hour delay. In contrast, patients with AD showed impaired learning and recognition of both unfamiliar and familiar melodies with no benefit of familiarity on recognition. Nevertheless, the familiarity decision-based ratings of patients was in keeping with controls. These findings suggest that musical recognition memory is impaired in AD, but the musical lexicon (as assessed by familiarity ratings) is preserved. These findings highlight the need to use both familiar and unfamiliar music in experimental tasks to study the different processes underlying recognition memory. |
| 25. | Narme, Pauline; Tonini, Audrey; Khatir, Fatiha; Schiaratura, Loris; Clément, Sylvain; Samson, Séverine Thérapies non médicamenteuses dans la maladie d’Alzheimer: comparaison d’ateliers musicaux et non musicaux Article de journal Dans: Gériatrie et Psychologie Neuropsychiatrie du Vieillissement, 10 (2), p. 215–224, 2012. @article{narme_therapies_2012, title = {Thérapies non médicamenteuses dans la maladie d’Alzheimer: comparaison d’ateliers musicaux et non musicaux}, author = {Pauline Narme and Audrey Tonini and Fatiha Khatir and Loris Schiaratura and Sylvain Clément and Séverine Samson}, url = {http://www.jle.com/fr/revues/gpn/e-docs/therapies_non_medicamenteuses_dans_la_maladie_dalzheimer_comparaison_dateliers_musicaux_et_non_musicaux_293265/article.phtml?tab=texte}, year = {2012}, date = {2012-01-01}, urldate = {2015-02-21}, journal = {Gériatrie et Psychologie Neuropsychiatrie du Vieillissement}, volume = {10}, number = {2}, pages = {215--224}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
| 26. | Clément, Sylvain; Tonini, Audrey; Khatir, Fatiha; Schiaratura, Loris; Samson, Séverine Short and Longer Term Effects of Musical Intervention in Severe Alzheimer's Disease Article de journal Dans: Music Perception: An Interdisciplinary Journal, 29 (5), p. 533–541, 2012, ISSN: 0730-7829. @article{clement_short_2012, title = {Short and Longer Term Effects of Musical Intervention in Severe Alzheimer's Disease}, author = {Sylvain Clément and Audrey Tonini and Fatiha Khatir and Loris Schiaratura and Séverine Samson}, url = {http://www.jstor.org/stable/10.1525/mp.2012.29.5.533}, doi = {10.1525/mp.2012.29.5.533}, issn = {0730-7829}, year = {2012}, date = {2012-01-01}, urldate = {2015-03-26}, journal = {Music Perception: An Interdisciplinary Journal}, volume = {29}, number = {5}, pages = {533--541}, abstract = {in this study, we examined short and longer term effects of musical and cooking interventions on emotional well-being of severe Alzheimer's disease (AD) patients. These two pleasurable activities (i.e., listening to music, tasting sweets) that were collectively performed (i.e., playing music together, collaborative preparation of a cake) were compared in two groups of matched patients with AD (N = 14). Each intervention lasted four weeks (two sessions per week) and their effects were regularly assessed up to four weeks after the end of the intervention. We repeatedly evaluated the emotional state of both groups before, during, and after the intervention periods by analyzing discourse content and facial expressions from short filmed interviews as well as caregivers' judgments of mood. The results reveal short-term benefits of both music and cooking interventions on emotional state on all these measures, but long-term benefits were only evident after the music intervention. The present finding suggests that non-pharmacological approaches offer promising methods to improve the quality of life of patients with dementia and that music stimulation is particularly effective to produce long lasting effects on patients' emotional well-being.}, keywords = {}, pubstate = {published}, tppubtype = {article} } in this study, we examined short and longer term effects of musical and cooking interventions on emotional well-being of severe Alzheimer's disease (AD) patients. These two pleasurable activities (i.e., listening to music, tasting sweets) that were collectively performed (i.e., playing music together, collaborative preparation of a cake) were compared in two groups of matched patients with AD (N = 14). Each intervention lasted four weeks (two sessions per week) and their effects were regularly assessed up to four weeks after the end of the intervention. We repeatedly evaluated the emotional state of both groups before, during, and after the intervention periods by analyzing discourse content and facial expressions from short filmed interviews as well as caregivers' judgments of mood. The results reveal short-term benefits of both music and cooking interventions on emotional state on all these measures, but long-term benefits were only evident after the music intervention. The present finding suggests that non-pharmacological approaches offer promising methods to improve the quality of life of patients with dementia and that music stimulation is particularly effective to produce long lasting effects on patients' emotional well-being. |
2010 |
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| 27. | Sammler, Daniela; Baird, Amee; Valabrègue, Romain; Clément, Sylvain; Dupont, Sophie; Belin, Pascal; Samson, Séverine The relationship of lyrics and tunes in the processing of unfamiliar songs: a functional magnetic resonance adaptation study Article de journal Dans: J. Neurosci., 30 (10), p. 3572–3578, 2010, ISSN: 1529-2401. @article{sammler_relationship_2010, title = {The relationship of lyrics and tunes in the processing of unfamiliar songs: a functional magnetic resonance adaptation study}, author = {Daniela Sammler and Amee Baird and Romain Valabrègue and Sylvain Clément and Sophie Dupont and Pascal Belin and Séverine Samson}, doi = {10.1523/JNEUROSCI.2751-09.2010}, issn = {1529-2401}, year = {2010}, date = {2010-03-01}, journal = {J. Neurosci.}, volume = {30}, number = {10}, pages = {3572--3578}, abstract = {The cognitive relationship between lyrics and tunes in song is currently under debate, with some researchers arguing that lyrics and tunes are represented as separate components, while others suggest that they are processed in integration. The present study addressed this issue by means of a functional magnetic resonance adaptation paradigm during passive listening to unfamiliar songs. The repetition and variation of lyrics and/or tunes in blocks of six songs was crossed in a 2 x 2 factorial design to induce selective adaptation for each component. Reductions of the hemodynamic response were observed along the superior temporal sulcus and gyrus (STS/STG) bilaterally. Within these regions, the left mid-STS showed an interaction of the adaptation effects for lyrics and tunes, suggesting an integrated processing of the two components at prelexical, phonemic processing levels. The degree of integration decayed toward more anterior regions of the left STS, where the lack of such an interaction and the stronger adaptation for lyrics than for tunes was suggestive of an independent processing of lyrics, perhaps resulting from the processing of meaning. Finally, evidence for an integrated representation of lyrics and tunes was found in the left dorsal precentral gyrus (PrCG), possibly relating to the build-up of a vocal code for singing in which musical and linguistic features of song are fused. Overall, these results demonstrate that lyrics and tunes are processed at varying degrees of integration (and separation) through the consecutive processing levels allocated along the posterior-anterior axis of the left STS and the left PrCG.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The cognitive relationship between lyrics and tunes in song is currently under debate, with some researchers arguing that lyrics and tunes are represented as separate components, while others suggest that they are processed in integration. The present study addressed this issue by means of a functional magnetic resonance adaptation paradigm during passive listening to unfamiliar songs. The repetition and variation of lyrics and/or tunes in blocks of six songs was crossed in a 2 x 2 factorial design to induce selective adaptation for each component. Reductions of the hemodynamic response were observed along the superior temporal sulcus and gyrus (STS/STG) bilaterally. Within these regions, the left mid-STS showed an interaction of the adaptation effects for lyrics and tunes, suggesting an integrated processing of the two components at prelexical, phonemic processing levels. The degree of integration decayed toward more anterior regions of the left STS, where the lack of such an interaction and the stronger adaptation for lyrics than for tunes was suggestive of an independent processing of lyrics, perhaps resulting from the processing of meaning. Finally, evidence for an integrated representation of lyrics and tunes was found in the left dorsal precentral gyrus (PrCG), possibly relating to the build-up of a vocal code for singing in which musical and linguistic features of song are fused. Overall, these results demonstrate that lyrics and tunes are processed at varying degrees of integration (and separation) through the consecutive processing levels allocated along the posterior-anterior axis of the left STS and the left PrCG. |
2008 |
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| 28. | Moussard, A; Bigand, E; Clément, S; Samson, S [Préservation des apprentissages implicites en musique dans le vieillissement normal et la maladie d'Alzheimer] Article de journal Dans: Revue de Neuropsychologie, 18 (2), p. 127–152, 2008. @article{moussard_[preservation_2008, title = {[Préservation des apprentissages implicites en musique dans le vieillissement normal et la maladie d'Alzheimer]}, author = {A Moussard and E Bigand and S Clément and S Samson}, year = {2008}, date = {2008-01-01}, journal = {Revue de Neuropsychologie}, volume = {18}, number = {2}, pages = {127--152}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
2005 |
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| 29. | Hesling, I; Clement, S; Bordessoules, M; Allard, M Cerebral mechanisms of prosodic integration: evidence from connected speech Article de journal Dans: Neuroimage, 24 (4), p. 937–947, 2005. @article{hesling_cerebral_2005, title = {Cerebral mechanisms of prosodic integration: evidence from connected speech}, author = {I Hesling and S Clement and M Bordessoules and M Allard}, url = {http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=15670670}, year = {2005}, date = {2005-01-01}, journal = {Neuroimage}, volume = {24}, number = {4}, pages = {937--947}, abstract = {Using functional Magnetic Resonance Imaging (fMRI) and long connected speech stimuli, we addressed the question of neuronal networks involved in prosodic integration by comparing (1) differences in brain activity when hearing connected speech stimuli with high and low degrees of prosodic expression; (2) differences in brain activity in two different diotic listening conditions (normal speech delivery to both ears, i.e., NN; and low-pass-filtered speech delivery to both ears, i.e., FF); and (3) effects of high and low degrees of prosodic information in the NN and FF conditions. Twelve right-handed French men listened passively to the stimuli. Each stimulus induced a specific cerebral network, the flat one weakening activations, which were mainly reduced to the bilateral STG for both listening conditions. High degrees of prosodic information were found to trigger right specific activations in a wider neuronal network involved in speech integration (such as BA44, BA21-22 and BA39-40) than low degrees of prosodic information did. More precisely, the right BA44 was found to be specifically involved in the process of F(0) modulations, which are the main acoustic correlate of prosody. Not only do the results achieved in the present experiment using 30-s-long connected speech stimuli show the involvement of a bilateral neuronal network but they also strongly suggest that high degrees of prosodic information elicit activations in a wider neuronal network involved in speech perception than low degrees of prosodic information do.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Using functional Magnetic Resonance Imaging (fMRI) and long connected speech stimuli, we addressed the question of neuronal networks involved in prosodic integration by comparing (1) differences in brain activity when hearing connected speech stimuli with high and low degrees of prosodic expression; (2) differences in brain activity in two different diotic listening conditions (normal speech delivery to both ears, i.e., NN; and low-pass-filtered speech delivery to both ears, i.e., FF); and (3) effects of high and low degrees of prosodic information in the NN and FF conditions. Twelve right-handed French men listened passively to the stimuli. Each stimulus induced a specific cerebral network, the flat one weakening activations, which were mainly reduced to the bilateral STG for both listening conditions. High degrees of prosodic information were found to trigger right specific activations in a wider neuronal network involved in speech integration (such as BA44, BA21-22 and BA39-40) than low degrees of prosodic information did. More precisely, the right BA44 was found to be specifically involved in the process of F(0) modulations, which are the main acoustic correlate of prosody. Not only do the results achieved in the present experiment using 30-s-long connected speech stimuli show the involvement of a bilateral neuronal network but they also strongly suggest that high degrees of prosodic information elicit activations in a wider neuronal network involved in speech perception than low degrees of prosodic information do. |
| 30. | Hesling, I; Dilharreguy, B; Clement, S; Bordessoules, M; Allard, M Cerebral mechanisms of prosodic sensory integration using low-frequency bands of connected speech Article de journal Dans: Hum Brain Mapp, 26 (3), p. 157–169, 2005. @article{hesling_cerebral_2005-1, title = {Cerebral mechanisms of prosodic sensory integration using low-frequency bands of connected speech}, author = {I Hesling and B Dilharreguy and S Clement and M Bordessoules and M Allard}, url = {http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=15929092}, year = {2005}, date = {2005-01-01}, journal = {Hum Brain Mapp}, volume = {26}, number = {3}, pages = {157--169}, abstract = {Even if speech perception has been reported to involve both left and right hemispheres, converging data have posited the existence of a functional asymmetry at the level of secondary auditory cortices. Using fMRI in 12 right-handed French men listening passively to long connected speech stimuli, we addressed the question of neuronal networks involved in the integration of low frequency bands of speech by comparing 1) differences in brain activity in two listening conditions (FN, NF) differing in the integration of pitch modulations (in FN, low frequencies, obtained by a low-pass filter, are addressed to the left ear while the whole acoustic message is simultaneously addressed to the right ear, NF being the reverse position); 2) differences in brain activity induced by high and low degrees of prosodic expression (expressive vs. flat); and 3) effects of the same connected speech stimulus in the two listening conditions. Each stimulus induced a specific cerebral network, the flat one weakening activations which were mainly reduced to the bilateral STG for both listening conditions. In the expressive condition, the specific sensory integration FN results in an increase of the articulatory loop and new recruitments such as right BA6-44, left BA39-40, the left posterior insula and the bilateral BA30. This finding may be accounted for by the existence of temporal windows differing both in length and in acoustic cues decoding, strengthening the "asymmetric sampling in time" hypothesis posited by Poeppel (Speech Commun 2003; 41:245-255). Such an improvement of prosodic integration could find applications in the rehabilitation of some speech disturbances.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Even if speech perception has been reported to involve both left and right hemispheres, converging data have posited the existence of a functional asymmetry at the level of secondary auditory cortices. Using fMRI in 12 right-handed French men listening passively to long connected speech stimuli, we addressed the question of neuronal networks involved in the integration of low frequency bands of speech by comparing 1) differences in brain activity in two listening conditions (FN, NF) differing in the integration of pitch modulations (in FN, low frequencies, obtained by a low-pass filter, are addressed to the left ear while the whole acoustic message is simultaneously addressed to the right ear, NF being the reverse position); 2) differences in brain activity induced by high and low degrees of prosodic expression (expressive vs. flat); and 3) effects of the same connected speech stimulus in the two listening conditions. Each stimulus induced a specific cerebral network, the flat one weakening activations which were mainly reduced to the bilateral STG for both listening conditions. In the expressive condition, the specific sensory integration FN results in an increase of the articulatory loop and new recruitments such as right BA6-44, left BA39-40, the left posterior insula and the bilateral BA30. This finding may be accounted for by the existence of temporal windows differing both in length and in acoustic cues decoding, strengthening the "asymmetric sampling in time" hypothesis posited by Poeppel (Speech Commun 2003; 41:245-255). Such an improvement of prosodic integration could find applications in the rehabilitation of some speech disturbances. |
2004 |
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| 31. | Sylvain, Clément; Christine, Moroni; Séverine, Samson Modularity in Sensory Auditory Memory Article de journal Dans: Polskie Forum Psychologiczne, 2004. @article{sylvain_modularity_2004, title = {Modularity in Sensory Auditory Memory}, author = {Clément Sylvain and Moroni Christine and Samson Séverine}, year = {2004}, date = {2004-01-01}, journal = {Polskie Forum Psychologiczne}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
2001 |
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| 32. | Demany, L; Clément, S; Semal, C Does auditory memory depend on attention? Inproceedings Dans: Breebaart, D J; Houtsma, A; Kohlrausch, A; Prijs, V F; Schoonhoven, R (Ed.): Physiological and Psychophysical bases of auditory function, p. 461–467, Shaker, 2001. @inproceedings{demany_does_2001, title = {Does auditory memory depend on attention?}, author = {L Demany and S Clément and C Semal}, editor = {Breebaart, D J and Houtsma, A and Kohlrausch, A and Prijs, V F and Schoonhoven, R}, year = {2001}, date = {2001-01-01}, booktitle = {Physiological and Psychophysical bases of auditory function}, pages = {461--467}, publisher = {Shaker}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
1999 |
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| 33. | Clement, S; Demany, L; Semal, C Memory for pitch versus memory for loudness Article de journal Dans: J. Acoust. Soc. Am., 106 (5), p. 2805–2811, 1999. @article{clement_memory_1999, title = {Memory for pitch versus memory for loudness}, author = {S Clement and L Demany and C Semal}, year = {1999}, date = {1999-01-01}, journal = {J. Acoust. Soc. Am.}, volume = {106}, number = {5}, pages = {2805--2811}, abstract = {The decays of pitch traces and loudness traces in short-term auditory memory were compared in forced-choice discrimination experiments. The two stimuli presented on each trial were separated by a variable delay (D); they consisted of pure tones, series of resolved harmonics, or series of unresolved harmonics mixed with lowpass noise. A roving procedure was employed in order to minimize the influence of context coding. During an initial phase of each experiment, frequency and intensity discrimination thresholds [P(C) = 0.80] were measured with an adaptive staircase method while D was fixed at 0.5 s. The corresponding physical differences (in cents or dB) were then constantly presented at four values of D: 0.5, 2, 5, and 10 s. In the case of intensity discrimination, performance (d') markedly decreased when D increased from 0.5 to 2 s, but was not further reduced when D was longer. In the case of frequency discrimination, the decline of performance as a function of D was significantly less abrupt. This divergence suggests that pitch and loudness are processed in separate modules of auditory memory.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The decays of pitch traces and loudness traces in short-term auditory memory were compared in forced-choice discrimination experiments. The two stimuli presented on each trial were separated by a variable delay (D); they consisted of pure tones, series of resolved harmonics, or series of unresolved harmonics mixed with lowpass noise. A roving procedure was employed in order to minimize the influence of context coding. During an initial phase of each experiment, frequency and intensity discrimination thresholds [P(C) = 0.80] were measured with an adaptive staircase method while D was fixed at 0.5 s. The corresponding physical differences (in cents or dB) were then constantly presented at four values of D: 0.5, 2, 5, and 10 s. In the case of intensity discrimination, performance (d') markedly decreased when D increased from 0.5 to 2 s, but was not further reduced when D was longer. In the case of frequency discrimination, the decline of performance as a function of D was significantly less abrupt. This divergence suggests that pitch and loudness are processed in separate modules of auditory memory. |
1998 |
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| 34. | Demany, Laurent; Clément, Sylvain The perceptual asymmetry of frequency modulation incollection Dans: Palmer, A R; Rees, A; Summerfield, A Q; Meddis, R (Ed.): Psychological and Physiological Advances in Hearing, p. 571–577, Whurr, London, 1998. @incollection{demany_perceptual_1998, title = {The perceptual asymmetry of frequency modulation}, author = {Laurent Demany and Sylvain Clément}, editor = {Palmer, A. R. and Rees, A. and Summerfield, A. Q. and Meddis, R.}, year = {1998}, date = {1998-01-01}, booktitle = {Psychological and Physiological Advances in Hearing}, pages = {571--577}, publisher = {Whurr}, address = {London}, keywords = {}, pubstate = {published}, tppubtype = {incollection} } |
1997 |
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| 35. | Demany, L; Clement, S The perception of frequency peaks and troughs in wide frequency modulations. IV. Effects of modulation waveform Article de journal Dans: J Acoust Soc Am, 102 (5 Pt 1), p. 2935–2944, 1997. @article{demany_perception_1997, title = {The perception of frequency peaks and troughs in wide frequency modulations. IV. Effects of modulation waveform}, author = {L Demany and S Clement}, year = {1997}, date = {1997-01-01}, journal = {J Acoust Soc Am}, volume = {102}, number = {5 Pt 1}, pages = {2935--2944}, abstract = {This work extends previous studies on the perceptual asymmetry between the local maxima and minima of wide frequency modulations (FMs) [L. Demany and K. I. McAnally, J. Acoust. Soc. Am. 96, 706-715 (1994); L. Demany and S. Clement, J. Acoust. Soc. Am. 97, 2454-2459 (1995); L. Demany and S. Clement, J. Acoust. Soc. Am. 98, 2515-2523 (1995)]. In experiment 1, subjects had to discriminate frequency shifts in the temporally central vertex of V- and A-shaped FMs imposed on 200-ms sinusoidal tone bursts. The precise shapes of these FMs varied in eight steps from quasi-triangles (with a durationless central vertex) to quasi-squares (with a long-duration central vertex). The central vertex was either a minimum or a maximum, but in each case the corresponding frequency was near 1000 Hz and the FM span was about 0.5 oct. For each FM shape, the discrimination threshold was lower when the vertex was a maximum than when it was a minimum, but (in four subjects out of five) this difference decreased monotonically as the FM became less and less triangular. FM shape had a remarkably small effect on the discrimination of the maxima, and the thresholds measured for the sharpest maxima were unexpectedly low. In subsequent experiments, subjects had to discriminate frequency shifts in the starting point or the final point of unidirectional FMs (tone glides) that spanned about 0.5 oct in 100 ms. The relevant frequency extremum was near 1000 Hz in each condition. At the final point of the glides, discrimination was better for rising glides than for falling glides. At the starting point of the glides, discrimination was better for falling glides than for rising glides. Thus discrimination was always better when the relevant frequency extremum was a maximum than when it was a minimum, and this effect was produced both "forward" and "backward." The latter fact suggests that the perceptual asymmetry of FM originates at least partly from central factors.}, keywords = {}, pubstate = {published}, tppubtype = {article} } This work extends previous studies on the perceptual asymmetry between the local maxima and minima of wide frequency modulations (FMs) [L. Demany and K. I. McAnally, J. Acoust. Soc. Am. 96, 706-715 (1994); L. Demany and S. Clement, J. Acoust. Soc. Am. 97, 2454-2459 (1995); L. Demany and S. Clement, J. Acoust. Soc. Am. 98, 2515-2523 (1995)]. In experiment 1, subjects had to discriminate frequency shifts in the temporally central vertex of V- and A-shaped FMs imposed on 200-ms sinusoidal tone bursts. The precise shapes of these FMs varied in eight steps from quasi-triangles (with a durationless central vertex) to quasi-squares (with a long-duration central vertex). The central vertex was either a minimum or a maximum, but in each case the corresponding frequency was near 1000 Hz and the FM span was about 0.5 oct. For each FM shape, the discrimination threshold was lower when the vertex was a maximum than when it was a minimum, but (in four subjects out of five) this difference decreased monotonically as the FM became less and less triangular. FM shape had a remarkably small effect on the discrimination of the maxima, and the thresholds measured for the sharpest maxima were unexpectedly low. In subsequent experiments, subjects had to discriminate frequency shifts in the starting point or the final point of unidirectional FMs (tone glides) that spanned about 0.5 oct in 100 ms. The relevant frequency extremum was near 1000 Hz in each condition. At the final point of the glides, discrimination was better for rising glides than for falling glides. At the starting point of the glides, discrimination was better for falling glides than for rising glides. Thus discrimination was always better when the relevant frequency extremum was a maximum than when it was a minimum, and this effect was produced both "forward" and "backward." The latter fact suggests that the perceptual asymmetry of FM originates at least partly from central factors. |
1995 |
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| 36. | Demany, L; Clement, S The perception of frequency peaks and troughs in wide frequency modulations. III. Complex carriers. Article de journal Dans: J Acoust Soc Am, 98 (5 Pt 1), p. 2515–2523, 1995. @article{demany_perception_1995, title = {The perception of frequency peaks and troughs in wide frequency modulations. III. Complex carriers.}, author = {L Demany and S Clement}, year = {1995}, date = {1995-11-01}, journal = {J Acoust Soc Am}, volume = {98}, number = {5 Pt 1}, pages = {2515--2523}, abstract = {In widely frequency-modulated (FM) sine tones, local frequency maxima are perceived more accurately than local frequency minima [L. Demany and K. I. McAnally, J. Acoust. Soc. Am. 96, 706-715 (1994); L. Demany and S. Clement, J. Acoust. Soc. Am. 97, 2454-2459 (1995)]. The aim of the present work was to determine if a similar perceptual asymmetry exists for nonsinusoidal FM carriers. Within each stimulus, the logarithm of instantaneous frequency followed one cycle of a (2.5- or 5-Hz) cosine function, starting at phase pi in the "peak" condition and phase 0 in the "trough" condition. In each condition, subjects had to detect shifts in the frequency apex occurring at the temporal center of the stimuli. In experiment 1, the FM functions were imposed on complex tones consisting of a series of consecutive harmonics. Some of the stimuli were bandpass filtered in a 1-oct window with fixed edges. The measured thresholds were about four times lower in the peak condition than in the trough condition, which suggests that the asymmetry previously observed for "spectral" pitches also exists for "virtual" pitches. In experiment 2, the FM carriers were Shepard tones. With such carriers, the standard peak and trough stimuli could be made identical at both the apex and the end points. In spite of these local identities, the results were similar to those of experiment 1, which suggests that the perceptual asymmetry is not determined by local differences between the stimuli and is instead a genuine "motion" effect.(ABSTRACT TRUNCATED AT 250 WORDS)}, keywords = {}, pubstate = {published}, tppubtype = {article} } In widely frequency-modulated (FM) sine tones, local frequency maxima are perceived more accurately than local frequency minima [L. Demany and K. I. McAnally, J. Acoust. Soc. Am. 96, 706-715 (1994); L. Demany and S. Clement, J. Acoust. Soc. Am. 97, 2454-2459 (1995)]. The aim of the present work was to determine if a similar perceptual asymmetry exists for nonsinusoidal FM carriers. Within each stimulus, the logarithm of instantaneous frequency followed one cycle of a (2.5- or 5-Hz) cosine function, starting at phase pi in the "peak" condition and phase 0 in the "trough" condition. In each condition, subjects had to detect shifts in the frequency apex occurring at the temporal center of the stimuli. In experiment 1, the FM functions were imposed on complex tones consisting of a series of consecutive harmonics. Some of the stimuli were bandpass filtered in a 1-oct window with fixed edges. The measured thresholds were about four times lower in the peak condition than in the trough condition, which suggests that the asymmetry previously observed for "spectral" pitches also exists for "virtual" pitches. In experiment 2, the FM carriers were Shepard tones. With such carriers, the standard peak and trough stimuli could be made identical at both the apex and the end points. In spite of these local identities, the results were similar to those of experiment 1, which suggests that the perceptual asymmetry is not determined by local differences between the stimuli and is instead a genuine "motion" effect.(ABSTRACT TRUNCATED AT 250 WORDS) |
| 37. | Demany, L; Clément, S The perception of frequency peaks and troughs in wide frequency modulations. II. Effects of frequency register, stimulus uncertainty, and intensity. Article de journal Dans: J Acoust Soc Am, 97 (4), p. 2454–2459, 1995. @article{demany_perception_1995-1, title = {The perception of frequency peaks and troughs in wide frequency modulations. II. Effects of frequency register, stimulus uncertainty, and intensity.}, author = {L Demany and S Clément}, year = {1995}, date = {1995-01-01}, journal = {J Acoust Soc Am}, volume = {97}, number = {4}, pages = {2454--2459}, abstract = {In widely frequency modulated sine tones, frequency maxima are perceived more accurately than frequency minima: A shift in a local frequency extremum is better detected when the extremum is a maximum than when it is a minimum, even within the same spectral region [L. Demany and K. I. McAnally, J. Acoust. Soc. Am. 96, 706-715 (1994)]. It is reported here that this perceptual asymmetry is about equally strong for frequency extrema near 250 and 1000 Hz, but weaker near 4000 Hz. It was also found that near 1000 Hz, the asymmetry is about equally strong for stimuli with an SPL of 35 and 70 dB, although the neural excitation patterns of a 1000-Hz tone probably have a different shape-and more specifically a different asymmetry-at these two levels. Finally, stimulus uncertainty was found to reduce the perceptual asymmetry: A weaker asymmetry was measured when the standard frequency extremum varied randomly from trial to trial than when it was fixed. The latter result, and the fact that the asymmetry did not decrease with training in the discrimination task, suggest that the asymmetry cannot be counteracted by "top-down" attentional processes and may be a preattentional phenomenon.}, keywords = {}, pubstate = {published}, tppubtype = {article} } In widely frequency modulated sine tones, frequency maxima are perceived more accurately than frequency minima: A shift in a local frequency extremum is better detected when the extremum is a maximum than when it is a minimum, even within the same spectral region [L. Demany and K. I. McAnally, J. Acoust. Soc. Am. 96, 706-715 (1994)]. It is reported here that this perceptual asymmetry is about equally strong for frequency extrema near 250 and 1000 Hz, but weaker near 4000 Hz. It was also found that near 1000 Hz, the asymmetry is about equally strong for stimuli with an SPL of 35 and 70 dB, although the neural excitation patterns of a 1000-Hz tone probably have a different shape-and more specifically a different asymmetry-at these two levels. Finally, stimulus uncertainty was found to reduce the perceptual asymmetry: A weaker asymmetry was measured when the standard frequency extremum varied randomly from trial to trial than when it was fixed. The latter result, and the fact that the asymmetry did not decrease with training in the discrimination task, suggest that the asymmetry cannot be counteracted by "top-down" attentional processes and may be a preattentional phenomenon. |