Parkinson's Disease

Frequently Asked Questions

4. What causes Parkinson's disease?

Parkinson's disease occurs when nerve cells, or neurons, in an area of the brain that controls movement die or become impaired. Normally, these neurons produce an important brain chemical known as dopamine, but once the neurons become impaired, they produce less dopamine and eventually die. It is this shortage of dopamine that causes the movement problems of people with Parkinson's.