Parkinson’s Disease

Neil Diamond
Neil Diamond. Photo by Jessie Eastland – Own work, CC BY-SA 3.0, Link

National Parkinson Foundation

Parkinson’s disease is a brain disorder.  It occurs when certain nerve cells (neurons) in a part of the brain called the substantia nigra die or become impaired. Normally, these cells produce a vital chemical known as dopamine. Dopamine allows smooth, coordinated function of the body’s muscles and movement.  When approximately 80% of the dopamine-producing cells are damaged, the symptoms of Parkinson’s disease appear.