Journal
BRAIN AND LANGUAGE
Volume 89, Issue 1, Pages 253-260Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/S0093-934X(03)00335-3
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The present study examined the neural correlates of speech and hand gesture comprehension in a naturalistic context. Fifteen participants watched audiovisual segments of speech and gesture while event-related potentials (ERPs) were recorded to the speech. Gesture influenced the ERPs to the speech. Specifically, there was a right-lateralized N400 effect-reflecting semantic integration-when gestures mismatched versus matched the speech. In addition, early sensory components in bilateral occipital and frontal sites differentiated speech accompanied by matching versus non-matching gestures. These results suggest that hand gestures may be integrated with speech at early and late stages of language processing. (C) 2003 Elsevier Inc. All rights reserved.
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