Is it possible to compare inhibitory and excitatory intracortical circuits in face and hand primary motor cortex?

ABSTRACT: Face muscles are important in a variety of different functions, such as feeding, speech and communication of non-verbal affective states, which require quite different patterns of activity from those of a typical hand muscle. We ask whether there are differences in their neurophysiological control that might reflect this. Fifteen healthy individuals were studied. Standard single- and paired-pulse transcranial magnetic stimulation (TMS) methods were used to compare intracortical inhibitory (short interval intracortical inhibition (SICI); cortical silent period (CSP)) and excitatory circuitries (short interval intracortical facilitation (SICF)) in two typical muscles, the depressor anguli oris (DAO), a face muscle, and the first dorsal interosseous (FDI), a hand muscle. TMS threshold was hig

SUBMITTER: Ginatempo F 

PROVIDER: S-EPMC9544430 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature