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Cortical Plasticity after Cochlear Implantation

The most dramatic progress in the restoration of hearing takes place in the first months after cochlear implantation. To map the brain activity underlying this process, we used positron emission tomography at three time points: within 14 days, three months, and six months after switch-on. Fifteen re...

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Detalles Bibliográficos
Autores principales: Petersen, B., Gjedde, A., Wallentin, M., Vuust, P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3860139/
https://www.ncbi.nlm.nih.gov/pubmed/24377050
http://dx.doi.org/10.1155/2013/318521
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author Petersen, B.
Gjedde, A.
Wallentin, M.
Vuust, P.
author_facet Petersen, B.
Gjedde, A.
Wallentin, M.
Vuust, P.
author_sort Petersen, B.
collection PubMed
description The most dramatic progress in the restoration of hearing takes place in the first months after cochlear implantation. To map the brain activity underlying this process, we used positron emission tomography at three time points: within 14 days, three months, and six months after switch-on. Fifteen recently implanted adult implant recipients listened to running speech or speech-like noise in four sequential PET sessions at each milestone. CI listeners with postlingual hearing loss showed differential activation of left superior temporal gyrus during speech and speech-like stimuli, unlike CI listeners with prelingual hearing loss. Furthermore, Broca's area was activated as an effect of time, but only in CI listeners with postlingual hearing loss. The study demonstrates that adaptation to the cochlear implant is highly related to the history of hearing loss. Speech processing in patients whose hearing loss occurred after the acquisition of language involves brain areas associated with speech comprehension, which is not the case for patients whose hearing loss occurred before the acquisition of language. Finally, the findings confirm the key role of Broca's area in restoration of speech perception, but only in individuals in whom Broca's area has been active prior to the loss of hearing.
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spelling pubmed-38601392013-12-29 Cortical Plasticity after Cochlear Implantation Petersen, B. Gjedde, A. Wallentin, M. Vuust, P. Neural Plast Research Article The most dramatic progress in the restoration of hearing takes place in the first months after cochlear implantation. To map the brain activity underlying this process, we used positron emission tomography at three time points: within 14 days, three months, and six months after switch-on. Fifteen recently implanted adult implant recipients listened to running speech or speech-like noise in four sequential PET sessions at each milestone. CI listeners with postlingual hearing loss showed differential activation of left superior temporal gyrus during speech and speech-like stimuli, unlike CI listeners with prelingual hearing loss. Furthermore, Broca's area was activated as an effect of time, but only in CI listeners with postlingual hearing loss. The study demonstrates that adaptation to the cochlear implant is highly related to the history of hearing loss. Speech processing in patients whose hearing loss occurred after the acquisition of language involves brain areas associated with speech comprehension, which is not the case for patients whose hearing loss occurred before the acquisition of language. Finally, the findings confirm the key role of Broca's area in restoration of speech perception, but only in individuals in whom Broca's area has been active prior to the loss of hearing. Hindawi Publishing Corporation 2013 2013-11-26 /pmc/articles/PMC3860139/ /pubmed/24377050 http://dx.doi.org/10.1155/2013/318521 Text en Copyright © 2013 B. Petersen et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Petersen, B.
Gjedde, A.
Wallentin, M.
Vuust, P.
Cortical Plasticity after Cochlear Implantation
title Cortical Plasticity after Cochlear Implantation
title_full Cortical Plasticity after Cochlear Implantation
title_fullStr Cortical Plasticity after Cochlear Implantation
title_full_unstemmed Cortical Plasticity after Cochlear Implantation
title_short Cortical Plasticity after Cochlear Implantation
title_sort cortical plasticity after cochlear implantation
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3860139/
https://www.ncbi.nlm.nih.gov/pubmed/24377050
http://dx.doi.org/10.1155/2013/318521
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