Phonological processing in post-lingual deafness and cochlear implant outcome.: Predictors of cochlear implant outcome

Abstract : Cochlear implants work well, yet the outcome is not fully accounted by the data routinely available to the clinician, and remains unpredictable. A more in-depth understanding of the neural mechanisms that determine the clinical recovery after cochlear implantation is warranted, as they may provide the background for an accurate individual prognosis. In this study in post-lingually deaf adults, we show that while clinical data offer only prognosis trends, fMRI data can prospectively distinguish good from poor implant performers. We show that those deaf cochlear implant (CI) candidates who will become good performers rely on a dorsal phonological route when performing a rhyming task on written regular words. In contrast, those who will become poor performers involve a ventral temporo-frontal route to perform the same task, and abnormally recruit the right supramarginal gyrus, a region that is contralateral to classical phonological regions. These functional patterns reveal that deafness either enhances "normal" phonological processing, or prompts a substitution of phonological processing by lexico-semantic processing. These findings thus suggest that a simple behavioral pre-operative exploration of phonological strategies during reading, to determine which route is predominantly used by CI candidates, might fruitfully inform the outcome.
Type de document :
Article dans une revue
NeuroImage, Elsevier, 2010, 49 (4), pp.3443-51. 〈10.1016/j.neuroimage.2009.11.013〉
Liste complète des métadonnées

http://www.hal.inserm.fr/inserm-00675311
Contributeur : Diane Lazard <>
Soumis le : mercredi 29 février 2012 - 18:01:10
Dernière modification le : mardi 24 avril 2018 - 17:20:13
Document(s) archivé(s) le : mercredi 30 mai 2012 - 02:32:02

Fichiers

Tables_lazard.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Diane Lazard, H. J. Lee, Michael Gaebler, Christian Kell, Eric Truy, et al.. Phonological processing in post-lingual deafness and cochlear implant outcome.: Predictors of cochlear implant outcome. NeuroImage, Elsevier, 2010, 49 (4), pp.3443-51. 〈10.1016/j.neuroimage.2009.11.013〉. 〈inserm-00675311〉

Partager

Métriques

Consultations de la notice

311

Téléchargements de fichiers

709