Lack of evidence for interhemispheric inhibition in the lower face primary motor cortex.

CONCLUSION: In the DAO there was no evidence of IHI even though this was clear in hand and axial muscles. Control experiments excluded a transcallosal origin of the facilitation observed at the shortest intervals.
SIGNIFICANCE: Data suggest that integrated bilateral control of facial muscles occurs mainly at the level of brainstem circuits engaged by corticobulbar output from fM1.
PMID: 31437744 [PubMed - as supplied by publisher]

Source: Clinical Neurophysiology - August 7, 2019 Category: Neurology Authors: Ginatempo F, Manzo N, Rothwell JC, Deriu F Tags: Clin Neurophysiol Source Type: research