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. 2006 Oct 23;17(15):1607-10.
doi: 10.1097/01.wnr.0000236856.93586.94.

A Role for the Inferior Colliculus in Multisensory Speech Integration

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A Role for the Inferior Colliculus in Multisensory Speech Integration

François Champoux et al. Neuroreport. .

Abstract

Multisensory integration can occur at relatively low levels within the central nervous system. Recent evidence suggests that multisensory audio-visual integration for speech may have a subcortical component, as acoustic processing in the human brainstem is influenced by lipreading during speech perception. Here, stimuli depicting the McGurk illusion (a demonstration of auditory-visual integration using speech stimuli) were presented to a 12-year-old child (FX) with a circumscribed unilateral lesion of the right inferior colliculus. When McGurk-type stimuli were presented in the contralesional hemifield, illusory perception reflecting bimodal integration was significantly reduced compared with the ipsilesional hemifield and a group of age-matched controls. These data suggest a functional role for the inferior colliculus in the audio-visual integration of speech stimuli.

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