The role of auditory cortices in the retrieval of single-trial auditory-visual object memories.

Détails

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Etat: Public
Version: Author's accepted manuscript
ID Serval
serval:BIB_FCC59D1DD884
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
The role of auditory cortices in the retrieval of single-trial auditory-visual object memories.
Périodique
European Journal of Neuroscience
Auteur(s)
Matusz P.J., Thelen A., Amrein S., Geiser E., Anken J., Murray M.M.
ISSN
1460-9568 (Electronic)
ISSN-L
0953-816X
Statut éditorial
Publié
Date de publication
2015
Volume
41
Numéro
5
Pages
699-708
Langue
anglais
Notes
Publication types: Journal ArticlePublication Status: ppublish
Résumé
Single-trial encounters with multisensory stimuli affect both memory performance and early-latency brain responses to visual stimuli. Whether and how auditory cortices support memory processes based on single-trial multisensory learning is unknown and may differ qualitatively and quantitatively from comparable processes within visual cortices due to purported differences in memory capacities across the senses. We recorded event-related potentials (ERPs) as healthy adults (n = 18) performed a continuous recognition task in the auditory modality, discriminating initial (new) from repeated (old) sounds of environmental objects. Initial presentations were either unisensory or multisensory; the latter entailed synchronous presentation of a semantically congruent or a meaningless image. Repeated presentations were exclusively auditory, thus differing only according to the context in which the sound was initially encountered. Discrimination abilities (indexed by d') were increased for repeated sounds that were initially encountered with a semantically congruent image versus sounds initially encountered with either a meaningless or no image. Analyses of ERPs within an electrical neuroimaging framework revealed that early stages of auditory processing of repeated sounds were affected by prior single-trial multisensory contexts. These effects followed from significantly reduced activity within a distributed network, including the right superior temporal cortex, suggesting an inverse relationship between brain activity and behavioural outcome on this task. The present findings demonstrate how auditory cortices contribute to long-term effects of multisensory experiences on auditory object discrimination. We propose a new framework for the efficacy of multisensory processes to impact both current multisensory stimulus processing and unisensory discrimination abilities later in time.
Pubmed
Web of science
Open Access
Oui
Création de la notice
02/04/2015 20:28
Dernière modification de la notice
20/08/2019 17:27
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