What disorder is characterized by a loss of dopaminergic fibers in the substantia nigra,which results in deficits in initiating voluntary movements,bradykinesia,and the progressive emergence of a resting tremor?
A)Huntington's disease
B)Parkinson's disease
C)Hemiballism
D)Cogwheeling

Question

Quizplus · Accepted Answer

Parkinson's disease is characterized by a loss of dopaminergic fibers in the substantia nigra, resulting in deficits in initiating voluntary movements, bradykinesia (slowness of movement), and the progressive emergence of a resting tremor. Huntington's disease is a genetic disorder that affects the basal ganglia and results in chorea (involuntary movements). Hemiballism is a movement disorder characterized by sudden, flinging movements of one side of the body. Cogwheeling is a symptom often seen in Parkinson's disease where there is a jerky resistance to passive movement of the limb.

What Disorder Is Characterized by a Loss of Dopaminergic Fibers