The phase of cortical oscillations determines the perceptual fate of visual cues in naturalistic audiovisual speech.

ABSTRACT: When we see our interlocutor, our brain seamlessly extracts visual cues from their face and processes them along with the sound of their voice, making speech an intrinsically multimodal signal. Visual cues are especially important in noisy environments, when the auditory signal is less reliable. Neuronal oscillations might be involved in the cortical processing of audiovisual speech by selecting which sensory channel contributes more to perception. To test this, we designed computer-generated naturalistic audiovisual speech stimuli where one mismatched phoneme-viseme pair in a key word of sentences created bistable perception. Neurophysiological recordings (high-density scalp and intracranial electroencephalography) revealed that the precise phase angle of theta-band oscillations in poster

SUBMITTER: Theze R 

PROVIDER: S-EPMC7673697 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature