Frontal cortex selects representations of the talker's mouth to aid in speech perception.

ABSTRACT: Human faces contain multiple sources of information. During speech perception, visual information from the talker's mouth is integrated with auditory information from the talker's voice. By directly recording neural responses from small populations of neurons in patients implanted with subdural electrodes, we found enhanced visual cortex responses to speech when auditory speech was absent (rendering visual speech especially relevant). Receptive field mapping demonstrated that this enhancement was specific to regions of the visual cortex with retinotopic representations of the mouth of the talker. Connectivity between frontal cortex and other brain regions was measured with trial-by-trial power correlations. Strong connectivity was observed between frontal cortex and mouth regions of visual

SUBMITTER: Ozker M 

PROVIDER: S-EPMC5828660 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature