ELECTRICAL EXCITABILITY OF THE MOTOR FACE AREA: A COMPARATIVE STUDY IN PRIMATES

Publisher Website
Google Scholar
Abstract
The cytoarchitectural characteristics of the face motor area of the macaque monkey, baboon and chimpanzee are correlated with their electrical response. Stimulation of Area 4 gives rise to contractions of individual muscles or groups of muscles independently of any adjacent cortex. Area 6 a [alpha] only in the presence of normal area 4 c and 6 b [alpha] give rise to complex movements of the face and tongue. Stimulation of area 6 b [alpha] causes rhythmical masticatory and deglutitory movements which occur even in the absence of adjacent cortex. Area 6 b [beta] produces changes in the respiratory rhythm. Bilateral movements are common from stimulation of the face motor area. Vocal cord movements and sialorrhoea may also be obtained.