The Muscle Rigidity and Poor Control of Posture Noted in Parkinson's

Multiple Choice

The muscle rigidity and poor control of posture noted in Parkinson's disease reflects

A) damage to frontal cortex neurons that plan motor movements.
B) damage to the primary motor cortex.
C) loss of inhibition to the motor cortex.
D) damage to dopamine neurons that normally facilitate motor movements.
E) loss of inhibition of the ventromedial motor system from the GPi.