Dystonia : Involuntary Muscle Movement
Dystonia is neurological involuntary movement disorder, in which a muscle (focal dystonia) or group of muscles contract (segmental dystonia), causing twisting body motions, tremors and repetitive abnormal postures or movements. Sometimes this disorder causes pain and affects any part of the body including the arms, trunk, neck, eyelids, face and vocal cards. In 1911, Herman ...