title: A role for the inferior colliculus in multisensory speech integration.
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.
authors.affiliation: School of Audiology and Speech Language Pathology, University of Montreal, Quebec, Canada.
authors.forename: François
authors.initials: F
authors.lastname: Champoux
authors.forename: Corinne
authors.initials: C
authors.lastname: Tremblay
authors.forename: Claude
authors.initials: C
authors.lastname: Mercier
authors.forename: Maryse
authors.initials: M
authors.lastname: Lassonde
authors.forename: Franco
authors.initials: F
authors.lastname: Lepore
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Gagné
authors.forename: Hugo
authors.initials: H
authors.lastname: Théoret
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods; D000293:Adolescent; D001308:Auditory Perceptual Disorders / Q000503:physiopathology; D001931:Brain Mapping; D002648:Child; D005260:Female; D006801:Humans; D007245:Inferior Colliculi / Q000502:physiology*; D008297:Male; D010775:Photic Stimulation / Q000379:methods; D013060:Speech; D013067:Speech Perception / Q000502:physiology*; D014794:Visual Fields / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*