Why do people with Parkinson's disease experience resting tremors?
A)Damage to the cerebellum alternately activates agonist/antagonist muscle pairs.
B)Excess glutamate is released in the premotor areas of the motor cortex.
C)Dopamine-secreting tumors directly activate alpha motor neurons.
D)Acetylcholinesterase at neuromuscular junctions is inactivated.
E)Activation of the sensorimotor cortex is reduced when the substantia nigra fails to deliver dopamine to the basal nuclei.

Question

Quizplus · Accepted Answer

Resting tremors are a common symptom of Parkinson's disease, which is characterized by the degeneration of dopaminergic neurons in the substantia nigra. This results in a reduction of dopamine delivery to the basal ganglia and affects the regulation of motor control. The substantia nigra normally provides dopamine to the basal ganglia, which activates the sensorimotor cortex and initiates voluntary movements. Without sufficient dopamine, the activation of the sensorimotor cortex is reduced, leading to resting tremors.

Why Do People with Parkinson's Disease Experience Resting Tremors