The visual speech head start improves perception and reduces superior temporal cortex responses to auditory speech.

ABSTRACT: Visual information about speech content from the talker's mouth is often available before auditory information from the talker's voice. Here we examined perceptual and neural responses to words with and without this visual head start. For both types of words, perception was enhanced by viewing the talker's face, but the enhancement was significantly greater for words with a head start. Neural responses were measured from electrodes implanted over auditory association cortex in the posterior superior temporal gyrus (pSTG) of epileptic patients. The presence of visual speech suppressed responses to auditory speech, more so for words with a visual head start. We suggest that the head start inhibits representations of incompatible auditory phonemes, increasing perceptual accuracy and decreasin

SUBMITTER: Karas PJ 

PROVIDER: S-EPMC6687434 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature