http://www.dystonia-parkinsons.org/whatisparkinsonsdisease.shtml
Bachmann-Strauss Dystonia and Parkinson Foundation
This document provides information about Parkinson's disease, a disorder of the central nervous system, which affects the area of the brain that regulates movement and muscles and is characterized by gradual, progressive muscle rigidity, tremors, and clumsiness. The document discusses what the symptoms of Parkinson’s disease are, what causes the disease, and what one can do.