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, and the progressive emergence of a resting tremor. Huntington's disease is characterized by involuntary choreiform movements. Hemiballism is characterized by a unilateral flinging movement of the limbs. Cogwheeling is a sign of Parkinsonism and refers to a jerky resistance to passive movement of a limb.

What Disorder Is Characterized by a Loss of Dopaminergic Fibers