In Parkinson's disease,
A)Input from the substantia nigra to the basal ganglia is impaired
B)Ability to suppress unwanted movement is impaired
C)Ability to make voluntary movements is not impaired
D)Both input from the substantia nigra to the basal ganglia is impaired and ability to suppress unwanted movement is impaired are correct
E)All of the choices are correct

Question

Quizplus · Accepted Answer

In Parkinson's disease, input from the substantia nigra to the basal ganglia is impaired, which affects the ability of the basal ganglia to properly communicate with other parts of the brain involved in movement. This results in impaired ability to suppress unwanted movement, leading to the characteristic tremors and muscle rigidity seen in Parkinson's disease. However, voluntary movement is also affected, as it is ultimately controlled by the same basal ganglia circuitry that is impaired in Parkinson's disease.

In Parkinson's Disease