Auditory event-related response in visual cortex modulates subsequent visual responses in humans.

摘要: Growing evidence from electrophysiological data in animal and human studies suggests that multisensory interaction is not exclusively a higher-order process, but also takes place primary sensory cortices. Such early thought to be mediated by means of phase resetting. The presentation stimulus one modality resets the ongoing oscillations another such processing latter modulated. In humans, for mechanism still sparse. current study, influence an auditory on visual was investigated measuring electroencephalogram (EEG) behavioral responses humans visual, auditory, audiovisual stimulation with varying stimulus-onset asynchrony (SOA). We observed three distinct oscillatory EEG our data. An initial gamma-band response around 50 Hz followed beta-band 25 Hz, theta 6 Hz. enhanced cross-modal stimuli as compared either unimodal stimuli. Interestingly, beta dominant electrodes over areas. SOA between stimuli—albeit consciously perceived—had modulatory impact evoked responses; i.e., amplitude depended sinusoidal fashion, suggesting reset. These findings further support notion parameters brain are essential predictors subsequent might mechanisms underlying integration.