Visual speech perception without primary auditory cortex activation

Visual speech perception without primary auditory cortex activation

Speech perception is conventionally thought to be an auditory function, but humans often use their eyes to perceive speech. We investigated whether visual speech perception depends on processing by the primary auditory cortex in hearing adults. In a functional magnetic resonance imaging experiment,...

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Bibliographic Details
Published in:Neuroreport Vol. 13; no. 3; pp. 311 - 315
Main Authors: Bernstein, Lynne E, Auer, Edward T, Moore, Jean K, Ponton, Curtis W, Don, Manual, Singh, Manbir
Format: Journal Article
Language:English
Published: Hagerstown, MD Lippincott Williams & Wilkins, Inc 04-03-2002
Lippincott Williams and Wilkins
Subjects:
Acoustic Stimulation
Adult
Anatomical correlates of behavior
Auditory Cortex - physiology
Behavioral psychophysiology
Biological and medical sciences
Female
Fundamental and applied biological sciences. Psychology
Humans
Image Processing, Computer-Assisted
Lipreading
Magnetic Resonance Imaging
Male
Nerve Net - physiology
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Speech Perception - physiology
Visual Perception - physiology
Articulation
Human
Language
Vision
Central nervous system
Cognition
Auditory pathway
Verbal perception
Nuclear magnetic resonance imaging
Auditory cortex
Brain (vertebrata)
Functional imaging
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Summary:Speech perception is conventionally thought to be an auditory function, but humans often use their eyes to perceive speech. We investigated whether visual speech perception depends on processing by the primary auditory cortex in hearing adults. In a functional magnetic resonance imaging experiment, a pulse-tone was presented contrasted with gradient noise. During the same session, a silent video of a talker saying isolated words was presented contrasted with a still face. Visual speech activated the superior temporal gyrus anterior, posterior, and lateral to the primary auditory cortex, but not the region of the primary auditory cortex. These results suggest that visual speech perception is not critically dependent on the region of primary auditory cortex.
Bibliography:ObjectType-Article-2
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ISSN:0959-4965
1473-558X
DOI:10.1097/00001756-200203040-00013