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  • Title: A role for the inferior colliculus in multisensory speech integration.
    Author: Champoux F, Tremblay C, Mercier C, Lassonde M, Lepore F, Gagné JP, Théoret H.
    Journal: Neuroreport; 2006 Oct 23; 17(15):1607-10. PubMed ID: 17001277.
    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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