Titre
Electrophysiological differences and similarities in audiovisual speech processing in CI users with unilateral and bilateral hearing loss.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Current research in neurobiology
Auteur(s)
Layer, N.
Auteure/Auteur
Weglage, A.
Auteure/Auteur
Müller, V.
Auteure/Auteur
Meister, H.
Auteure/Auteur
Lang-Roth, R.
Auteure/Auteur
Walger, M.
Auteure/Auteur
Murray, M.M.
Auteure/Auteur
Sandmann, P.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
2665-945X
Statut éditorial
Publié
Date de publication
2022
Volume
3
Première page
100059
Peer-reviewed
Oui
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: epublish
Publication Status: epublish
Résumé
Hearing with a cochlear implant (CI) is limited compared to natural hearing. Although CI users may develop compensatory strategies, it is currently unknown whether these extend from auditory to visual functions, and whether compensatory strategies vary between different CI user groups. To better understand the experience-dependent contributions to multisensory plasticity in audiovisual speech perception, the current event-related potential (ERP) study presented syllables in auditory, visual, and audiovisual conditions to CI users with unilateral or bilateral hearing loss, as well as to normal-hearing (NH) controls. Behavioural results revealed shorter audiovisual response times compared to unisensory conditions for all groups. Multisensory integration was confirmed by electrical neuroimaging, including topographic and ERP source analysis, showing a visual modulation of the auditory-cortex response at N1 and P2 latency. However, CI users with bilateral hearing loss showed a distinct pattern of N1 topography, indicating a stronger visual impact on auditory speech processing compared to CI users with unilateral hearing loss and NH listeners. Furthermore, both CI user groups showed a delayed auditory-cortex activation and an additional recruitment of the visual cortex, and a better lip-reading ability compared to NH listeners. In sum, these results extend previous findings by showing distinct multisensory processes not only between NH listeners and CI users in general, but even between CI users with unilateral and bilateral hearing loss. However, the comparably enhanced lip-reading ability and visual-cortex activation in both CI user groups suggest that these visual improvements are evident regardless of the hearing status of the contralateral ear.
PID Serval
serval:BIB_6A6ABD96A0D2
PMID
Open Access
Oui
Date de création
2022-11-28T13:55:51.567Z
Date de création dans IRIS
2025-05-20T23:57:09Z
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Nom
Layer-2022-CurrResNeurobiol.pdf
Version du manuscrit
published
Licence
https://creativecommons.org/licenses/by-nc-nd/4.0
Taille
4.45 MB
Format
Adobe PDF
PID Serval
serval:BIB_6A6ABD96A0D2.P001
URN
urn:nbn:ch:serval-BIB_6A6ABD96A0D25
Somme de contrôle
(MD5):30ed0e8243f5c91e3ea4b127f0bd2095