Cross-modal reorganization and speech perception in cochlear implant users
Identifieur interne : 002776 ( Main/Exploration ); précédent : 002775; suivant : 002777Cross-modal reorganization and speech perception in cochlear implant users
Auteurs : M. E. Doucet [Canada] ; F. Bergeron [Canada] ; M. Lassonde [Canada] ; P. Ferron [Canada] ; F. Lepore [Canada]Source :
- Brain [ 0006-8950 ] ; 2006-09-26.
Abstract
Recent work suggests that once the auditory cortex of deaf persons has been reorganized by cross-modal plasticity, it can no longer respond to signals from a cochlear implant (CI) installed subsequently. To further examine this issue, we compared the evoked potentials involved in the processing of visual stimuli between CI users and hearing controls. The stimuli were concentric circles replaced by a different overlapping shape, inducing a shape transformation, known to activate the ventral visual pathway in human adults. All CI users had their device implanted for >1 year, but obtained different levels of auditory performance following training to establish language comprehension. Seven of the 13 patients showed good capacities for speech recognition with the CI (good performers) while the six others demonstrated poor speech recognition abilities (poor performers). The evoked potentials of all patients showed larger amplitudes, with different distributions of scalp activations between the two groups. The poor performers exhibited broader, anteriorly distributed, high P2 amplitudes over the cortex whereas the good performers showed significantly higher P2 amplitudes over visual occipital areas. These results suggest the existence of a profound cross-modal reorganization in the poor performers and an intramodal reorganization in the good performers. We interpret these data on the basis of enhanced audiovisual coupling as the key to a long-term functional improvement in speech discrimination in CI users.
Url:
DOI: 10.1093/brain/awl264
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001215
- to stream Istex, to step Curation: 001215
- to stream Istex, to step Checkpoint: 000B19
- to stream Main, to step Merge: 002A63
- to stream Main, to step Curation: 002776
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title>Cross-modal reorganization and speech perception in cochlear implant users</title><author><name sortKey="Doucet, M E" sort="Doucet, M E" uniqKey="Doucet M" first="M. E." last="Doucet">M. E. Doucet</name></author><author><name sortKey="Bergeron, F" sort="Bergeron, F" uniqKey="Bergeron F" first="F." last="Bergeron">F. Bergeron</name></author><author><name sortKey="Lassonde, M" sort="Lassonde, M" uniqKey="Lassonde M" first="M." last="Lassonde">M. Lassonde</name></author><author><name sortKey="Ferron, P" sort="Ferron, P" uniqKey="Ferron P" first="P." last="Ferron">P. Ferron</name></author><author><name sortKey="Lepore, F" sort="Lepore, F" uniqKey="Lepore F" first="F." last="Lepore">F. Lepore</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:C83D7F7B021B736044B46DED9A186B4A01A4F488</idno><date when="2006" year="2006">2006</date><idno type="doi">10.1093/brain/awl264</idno><idno type="url">https://api-v5.istex.fr/document/C83D7F7B021B736044B46DED9A186B4A01A4F488/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001215</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001215</idno><idno type="wicri:Area/Istex/Curation">001215</idno><idno type="wicri:Area/Istex/Checkpoint">000B19</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000B19</idno><idno type="wicri:doubleKey">0006-8950:2006:Doucet M:cross:modal:reorganization</idno><idno type="wicri:Area/Main/Merge">002A63</idno><idno type="wicri:Area/Main/Curation">002776</idno><idno type="wicri:Area/Main/Exploration">002776</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">Cross-modal reorganization and speech perception in cochlear implant users</title><author><name sortKey="Doucet, M E" sort="Doucet, M E" uniqKey="Doucet M" first="M. E." last="Doucet">M. E. Doucet</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Centre de Recherche en Neuropsychologie et Cognition, Université de Montréal Montréal</wicri:regionArea><wicri:noRegion>Université de Montréal Montréal</wicri:noRegion></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Correspondence to: Dr Franco Lepore, Département de Psychologie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Québec H3C 3J7</wicri:regionArea><wicri:noRegion>Québec H3C 3J7</wicri:noRegion></affiliation></author><author><name sortKey="Bergeron, F" sort="Bergeron, F" uniqKey="Bergeron F" first="F." last="Bergeron">F. Bergeron</name><affiliation></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Correspondence to: Dr Franco Lepore, Département de Psychologie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Québec H3C 3J7</wicri:regionArea><wicri:noRegion>Québec H3C 3J7</wicri:noRegion></affiliation></author><author><name sortKey="Lassonde, M" sort="Lassonde, M" uniqKey="Lassonde M" first="M." last="Lassonde">M. Lassonde</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Centre de Recherche en Neuropsychologie et Cognition, Université de Montréal Montréal</wicri:regionArea><wicri:noRegion>Université de Montréal Montréal</wicri:noRegion></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Correspondence to: Dr Franco Lepore, Département de Psychologie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Québec H3C 3J7</wicri:regionArea><wicri:noRegion>Québec H3C 3J7</wicri:noRegion></affiliation></author><author><name sortKey="Ferron, P" sort="Ferron, P" uniqKey="Ferron P" first="P." last="Ferron">P. Ferron</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Centre Hospitalier Universitaire de Québec</wicri:regionArea></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Correspondence to: Dr Franco Lepore, Département de Psychologie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Québec H3C 3J7</wicri:regionArea><wicri:noRegion>Québec H3C 3J7</wicri:noRegion></affiliation></author><author><name sortKey="Lepore, F" sort="Lepore, F" uniqKey="Lepore F" first="F." last="Lepore">F. Lepore</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Centre de Recherche en Neuropsychologie et Cognition, Université de Montréal Montréal</wicri:regionArea><wicri:noRegion>Université de Montréal Montréal</wicri:noRegion></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>Correspondence to: Dr Franco Lepore, Département de Psychologie, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Québec H3C 3J7</wicri:regionArea><wicri:noRegion>Québec H3C 3J7</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Brain</title><idno type="ISSN">0006-8950</idno><idno type="eISSN">1460-2156</idno><imprint><publisher>Oxford University Press</publisher><date type="published" when="2006-09-26">2006-09-26</date><biblScope unit="volume">129</biblScope><biblScope unit="issue">12</biblScope><biblScope unit="page" from="3376">3376</biblScope><biblScope unit="page" to="3383">3383</biblScope></imprint><idno type="ISSN">0006-8950</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0006-8950</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract">Recent work suggests that once the auditory cortex of deaf persons has been reorganized by cross-modal plasticity, it can no longer respond to signals from a cochlear implant (CI) installed subsequently. To further examine this issue, we compared the evoked potentials involved in the processing of visual stimuli between CI users and hearing controls. The stimuli were concentric circles replaced by a different overlapping shape, inducing a shape transformation, known to activate the ventral visual pathway in human adults. All CI users had their device implanted for >1 year, but obtained different levels of auditory performance following training to establish language comprehension. Seven of the 13 patients showed good capacities for speech recognition with the CI (good performers) while the six others demonstrated poor speech recognition abilities (poor performers). The evoked potentials of all patients showed larger amplitudes, with different distributions of scalp activations between the two groups. The poor performers exhibited broader, anteriorly distributed, high P2 amplitudes over the cortex whereas the good performers showed significantly higher P2 amplitudes over visual occipital areas. These results suggest the existence of a profound cross-modal reorganization in the poor performers and an intramodal reorganization in the good performers. We interpret these data on the basis of enhanced audiovisual coupling as the key to a long-term functional improvement in speech discrimination in CI users.</div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Doucet, M E" sort="Doucet, M E" uniqKey="Doucet M" first="M. E." last="Doucet">M. E. Doucet</name></noRegion><name sortKey="Bergeron, F" sort="Bergeron, F" uniqKey="Bergeron F" first="F." last="Bergeron">F. Bergeron</name><name sortKey="Doucet, M E" sort="Doucet, M E" uniqKey="Doucet M" first="M. E." last="Doucet">M. E. Doucet</name><name sortKey="Ferron, P" sort="Ferron, P" uniqKey="Ferron P" first="P." last="Ferron">P. Ferron</name><name sortKey="Ferron, P" sort="Ferron, P" uniqKey="Ferron P" first="P." last="Ferron">P. Ferron</name><name sortKey="Lassonde, M" sort="Lassonde, M" uniqKey="Lassonde M" first="M." last="Lassonde">M. Lassonde</name><name sortKey="Lassonde, M" sort="Lassonde, M" uniqKey="Lassonde M" first="M." last="Lassonde">M. Lassonde</name><name sortKey="Lepore, F" sort="Lepore, F" uniqKey="Lepore F" first="F." last="Lepore">F. Lepore</name><name sortKey="Lepore, F" sort="Lepore, F" uniqKey="Lepore F" first="F." last="Lepore">F. Lepore</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Canada/explor/ParkinsonCanadaV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002776 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 002776 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Canada
|area= ParkinsonCanadaV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:C83D7F7B021B736044B46DED9A186B4A01A4F488
|texte= Cross-modal reorganization and speech perception in cochlear implant users
}}
| This area was generated with Dilib version V0.6.29. |  |