Motor engagement relates to accurate perception of phonemes and audiovisual words, but not auditory words.

ABSTRACT: A longstanding debate has surrounded the role of the motor system in speech perception, but progress in this area has been limited by tasks that only examine isolated syllables and conflate decision-making with perception. Using an adaptive task that temporally isolates perception from decision-making, we examined an EEG signature of motor activity (sensorimotor μ/beta suppression) during the perception of auditory phonemes, auditory words, audiovisual words, and environmental sounds while holding difficulty constant at two levels (Easy/Hard). Results revealed left-lateralized sensorimotor μ/beta suppression that was related to perception of speech but not environmental sounds. Audiovisual word and phoneme stimuli showed enhanced left sensorimotor μ/beta suppression for correct relative to

SUBMITTER: Michaelis K 

PROVIDER: S-EPMC7835217 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature