http://www.dystonia-foundation.org/pages/frequently_asked_questions/98.php
Dystonia Medical Research Foundation
This document presents frequently asked questions about dystonia, a neurological movement disorder characterized by involuntary muscle contractions, which force certain parts of the body into abnormal, sometimes painful, movements or postures. The document includes answers on what part of the body dystonia affects, what causes dystonia, who gets dystonia, and more.