Representation of Sound Objects within Early-Stage Auditory Areas: A Repetition Effect Study Using 7T fMRI.

Détails

Ressource 1Télécharger: BIB_A5E42C8B391E.P001.pdf (793.01 [Ko])
Etat: Public
Version: Final published version
ID Serval
serval:BIB_A5E42C8B391E
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Representation of Sound Objects within Early-Stage Auditory Areas: A Repetition Effect Study Using 7T fMRI.
Périodique
Plos One
Auteur(s)
Da Costa S., Bourquin N.M., Knebel J.F., Saenz M., van der Zwaag W., Clarke S.
ISSN
1932-6203 (Electronic)
ISSN-L
1932-6203
Statut éditorial
Publié
Date de publication
2015
Peer-reviewed
Oui
Volume
10
Numéro
5
Pages
e0124072
Langue
anglais
Notes
Publication types: Journal Article Publication Status: epublish
Résumé
Environmental sounds are highly complex stimuli whose recognition depends on the interaction of top-down and bottom-up processes in the brain. Their semantic representations were shown to yield repetition suppression effects, i. e. a decrease in activity during exposure to a sound that is perceived as belonging to the same source as a preceding sound. Making use of the high spatial resolution of 7T fMRI we have investigated the representations of sound objects within early-stage auditory areas on the supratemporal plane. The primary auditory cortex was identified by means of tonotopic mapping and the non-primary areas by comparison with previous histological studies. Repeated presentations of different exemplars of the same sound source, as compared to the presentation of different sound sources, yielded significant repetition suppression effects within a subset of early-stage areas. This effect was found within the right hemisphere in primary areas A1 and R as well as two non-primary areas on the antero-medial part of the planum temporale, and within the left hemisphere in A1 and a non-primary area on the medial part of Heschl's gyrus. Thus, several, but not all early-stage auditory areas encode the meaning of environmental sounds.
Pubmed
Web of science
Open Access
Oui
Création de la notice
31/05/2015 9:33
Dernière modification de la notice
20/08/2019 16:11
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