Damage to the substantia nigra causes a decrease in the neurotransmitter dopamine. This causes a gradual,generalized increase in muscle tone, which is the main symptom of
A) Parkinson's disease.
B) rabies.
C) Alzheimer's disease.
D) myasthenia gravis.
E) tetanus.

Question

Quizplus · Accepted Answer

Parkinson's disease is caused by damage to the substantia nigra, leading to a decrease in dopamine. The main symptom of Parkinson's disease is a gradual increase in muscle tone, also known as rigidity. Rabies, Alzheimer's disease, myasthenia gravis, and tetanus do not typically involve this symptom.

Damage to the Substantia Nigra Causes a Decrease in the Neurotransmitter