Increased Connectivity among Sensory and Motor Regions during Visual and Audiovisual Speech Perception.

ABSTRACT: In everyday conversation, we usually process the talker's face as well as the sound of the talker's voice. Access to visual speech information is particularly useful when the auditory signal is degraded. Here, we used fMRI to monitor brain activity while adult humans (n = 60) were presented with visual-only, auditory-only, and audiovisual words. The audiovisual words were presented in quiet and in several signal-to-noise ratios. As expected, audiovisual speech perception recruited both auditory and visual cortex, with some evidence for increased recruitment of premotor cortex in some conditions (including in substantial background noise). We then investigated neural connectivity using psychophysiological interaction analysis with seed regions in both primary auditory cortex and prim

SUBMITTER: Peelle JE 

PROVIDER: S-EPMC8802926 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature