Patients with damage to subcortical motor areas lose
A) voluntary control of facial muscles but retain spontaneous expression.
B) spontaneous expression but retain voluntary control of facial muscles.
C) both voluntary control of facial muscles and spontaneous expression.
D) neither voluntary control of facial muscles nor spontaneous expression.

Question

Quizplus · Accepted Answer

Damage to subcortical motor areas typically impairs voluntary control of facial muscles while sparing the ability for spontaneous expression. This is because the pathways for voluntary and spontaneous facial movements are mediated by different parts of the brain; voluntary movements are controlled by the motor cortex and its connections, which when damaged impair voluntary control, while spontaneous expressions are often mediated by subcortical structures that can remain intact.

Patients with Damage to Subcortical Motor Areas Lose