In most cases of Parkinson's disease, the underlying causes are ______.
A) drug-induced
B) viral infection
C) atherosclerosis
D) unknown

Question

Quizplus · Accepted Answer

The underlying causes of Parkinson's disease are still unknown, though it is believed to be a combination of genetic and environmental factors. While drug-induced Parkinson's and viral infection-induced Parkinson's do exist, they are not the most common causes. Atherosclerosis is not related to Parkinson's disease.

In Most Cases of Parkinson's Disease, the Underlying Causes Are