Cortical operational synchrony during audio-visual speech integration.
Information from different sensory modalities is processed in different cortical regions. However, our daily perception is based on the overall impression resulting from the integration of information from multiple sensory modalities. At present it is not known how the human brain integrates information from different modalities into a unified percept. Using a robust phenomenon known as the McGurk effect it was shown in the present study that audio-visual synthesis takes place within a distributed and dynamic cortical networks with emergent properties. Various cortical sites within these networks interact with each other by means of so-called operational synchrony (Kaplan, Fingelkurts, Fingelkurts, & Darkhovsky, 1997). The temporal synchronization of cortical operations processing unimodal stimuli at different cortical sites reveals the importance of the temporal features of auditory and visual stimuli for audio-visual speech integration.
Human Brain Research Group, Human Physiology Department, Moscow State University, 119899 Moscow, Russian Federation. andrew.fingelkurts@bm-science.com
Andrew A
AA
Fingelkurts
Alexander A
AA
Fingelkurts
Christina M
CM
Krause
Riikka
R
Möttönen
Mikko
M
Sams
D002540:Cerebral Cortex / Q000502:physiology*; D003344:Cortical Synchronization / Q000295:instrumentation*; D005260:Female; D006801:Humans; D015225:Magnetoencephalography / Q000295:instrumentation; D009415:Nerve Net / Q000502:physiology*; D013067:Speech Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*