Journal
EXPERIMENTAL BRAIN RESEARCH
Volume 168, Issue 1-2, Pages 1-10Publisher
SPRINGER
DOI: 10.1007/s00221-005-0071-5
Keywords
auditory; visual; brainstem; multisensory; speech
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Funding
- NIDCD NIH HHS [R01 DC001510, R01 DC001510-12, R01 DC01510] Funding Source: Medline
- NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS [R01DC001510] Funding Source: NIH RePORTER
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Afferent auditory processing in the human brainstem is often assumed to be determined by acoustic stimulus features alone and immune to stimulation by other senses or cognitive factors. In contrast, we show that lipreading during speech perception influences early acoustic processing. Event-related brainstem potentials were recorded from ten healthy adults to concordant (acoustic-visual match), conflicting (acoustic-visual mismatch) and unimodal stimuli. Audiovisual (AV) interactions occurred as early as similar to 11 ms post-acoustic stimulation and persisted for the first 30 ms of the response. Furthermore, the magnitude of interaction depended on AV pairings. These findings indicate considerable plasticity in early auditory processing.
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