Cargando…
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...
Autores principales: | , , , |
---|---|
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 |
_version_ | 1782295509536342016 |
---|---|
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. |
format | Online Article Text |
id | pubmed-3860139 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Hindawi Publishing Corporation |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT petersenb corticalplasticityaftercochlearimplantation AT gjeddea corticalplasticityaftercochlearimplantation AT wallentinm corticalplasticityaftercochlearimplantation AT vuustp corticalplasticityaftercochlearimplantation |