Activation of Auditory Cortex During Silent Lipreading
SciencePublished 25 April 1997
Gemma A. Calvert, Edward T. Bullmore, Michael J. Brammer, Ruth Campbell, Steven Williams, Philip McGuire
Citations1,036
SJR quartileQ1
SJR score10.42
SNIP6.62
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TL;DR
Three experiments suggest that these auditory cortical areas are not engaged when an individual is viewing nonlinguistic facial movements but appear to be activated by silent meaningless speechlike movements (pseudospeech), which supports psycholinguistic evidence that seen speech influences the perception of heard speech at a prelexical stage.
Abstract
Watching a speaker's lips during face-to-face conversation (lipreading) markedly improves speech perception, particularly in noisy conditions. With functional magnetic resonance imaging it was found that these linguistic visual cues are sufficient to activate auditory cortex in normal hearing individuals in the absence of auditory speech sounds. Two further experiments suggest that these auditory cortical areas are not engaged when an individual is viewing nonlinguistic facial movements but appear to be activated by silent meaningless speechlike movements (pseudospeech). This supports psycholinguistic evidence that seen speech influences the perception of heard speech at a prelexical stage.
Keywords
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