Dystonia Disorder (Muscle Tone Disorder) Causes, Symptoms, Diagnosis and Treatment Information

What are the dystonias? The dystonias are movement disorders in which sustained muscle contractions cause twisting and repetitive movements or abnormal postures. The movements, which are involuntary and sometimes painful, may affect a single muscle; a group of muscles such as those in the arms, legs, or neck; or the entire body. Those with dystonia usually have normal intelligence and no