Dystonia is the term used to describe a movement disorder
characterized by involuntary muscle spasms. These spasms can affect
different areas of the body and often force certain parts of the body
into abnormal movements and postures, some of which are painful.
What does dystonia affect?
Dystonia can affect the neck (cervical dystonia), the eye muscles
(blepharospasm), the hand (writer's cramp), the trunk, arms and legs
as well as other areas. Dystonia is classified by age of onset, by the
parts of the body affected and by cause. Generalized dystonia affects
several areas of the body whereas focal dystonia is limited to one area.