Auditory cortex tracks both auditory and visual stimulus dynamics using low-frequency neuronal phase modulation.

ABSTRACT: Integrating information across sensory domains to construct a unified representation of multi-sensory signals is a fundamental characteristic of perception in ecological contexts. One provocative hypothesis deriving from neurophysiology suggests that there exists early and direct cross-modal phase modulation. We provide evidence, based on magnetoencephalography (MEG) recordings from participants viewing audiovisual movies, that low-frequency neuronal information lies at the basis of the synergistic coordination of information across auditory and visual streams. In particular, the phase of the 2-7 Hz delta and theta band responses carries robust (in single trials) and usable information (for parsing the temporal structure) about stimulus dynamics in both sensory modalities concurrently. The

SUBMITTER: Luo H 

PROVIDER: S-EPMC2919416 | biostudies-literature | 2010 Aug

REPOSITORIES: biostudies-literature