What is (are) Dystonia 8 ?
Paroxysmal nonkinesigenic dyskinesia is a disorder of the nervous system that causes periods of involuntary movement. Common symptoms include 1 to 4 hour long episodes of irregular, jerking or shaking movements, prolonged contraction of muscles, chorea, and/or writhing movements of the limb. The movements may have no known trigger or be brought on by alcohol, caffeine, stress, fatigue, menses, or excitement.  The familial form is caused by mutations in the PNKD gene and is inherited in an autosomal dominant pattern.