Bilateral human laryngeal motor cortex in perceptual decision of lexical tone and voicing of consonant.

ABSTRACT: Speech perception is believed to recruit the left motor cortex. However, the exact role of the laryngeal subregion and its right counterpart in speech perception, as well as their temporal patterns of involvement remain unclear. To address these questions, we conducted a hypothesis-driven study, utilizing transcranial magnetic stimulation on the left or right dorsal laryngeal motor cortex (dLMC) when participants performed perceptual decision on Mandarin lexical tone or consonant (voicing contrast) presented with or without noise. We used psychometric function and hierarchical drift-diffusion model to disentangle perceptual sensitivity and dynamic decision-making parameters. Results showed that bilateral dLMCs were engaged with effector specificity, and this engagement was left-lateralized

SUBMITTER: Liang B 

PROVIDER: S-EPMC10404239 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature