Pre-stimulus beta-band oscillations influence the perception of the sound induced flash illusion

Abstract

Recent studies have reported on the influence of pre-stimulus oscillatory brain activity on multimodal perception. In a previous study using the McGurk illusion, we found that varying perception upon invariant stimulation is preceded by modulations in local beta band power in the left superior temporal gyrus and phase locking to frontal and temporal areas. As this illusion uses complex visual and auditory stimuli, we used the simpler Sound Induced Flash Illusion (SIFI) paradigm to elucidate the basic processes associated with modulations of multimodal perception.