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Perception audiovisuelle de la parole chez le sourd postlingual implanté cochléaire et le sujet normo-entendant : étude longitudinale psychophysique et neurofonctionnelle

Abstract : Our present work consisted in studying perceptual and neuronal mechanisms involved during audiovisual speech perception in postlingually deaf cochlear-implant patients and normally hearing controls. With this aim in view we tested audiovisual performance for implanted patients during longitudinal follow-ups using behavioral methods and positron emission tomography neuroimagery, as well as incongruent audiovisual speech (McGurk paradigm). In order to achieve appropriate comparisons, control subjects were tested in identical conditions. Moreover they were tested in a speech-reading condition and with auditory and audiovisual speech degraded through white-noise masks and cochlear-implant computer simulations. Results from these studies agree to point out, following cochlear implantation, a fast reorganization of multisensory cortical networks involved in audiovisual speech integration, leading to an optimal combination of audiovisual perceptual cues.
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https://tel.archives-ouvertes.fr/tel-00364405
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Submitted on : Thursday, February 26, 2009 - 10:46:07 AM
Last modification on : Monday, October 19, 2020 - 11:12:07 AM
Long-term archiving on: : Tuesday, June 8, 2010 - 7:24:31 PM

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  • HAL Id : tel-00364405, version 1

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Julien Rouger. Perception audiovisuelle de la parole chez le sourd postlingual implanté cochléaire et le sujet normo-entendant : étude longitudinale psychophysique et neurofonctionnelle. Neurosciences [q-bio.NC]. Université Paul Sabatier - Toulouse III, 2007. Français. ⟨tel-00364405⟩

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