Dystonia
Dystonia affects approximately 250,000 people in the U.S., making it the third most common movement disorder, following Essential Tremor and Parkinson’s disease. In fact, dystonia may be present in people with other neurological conditions such as Parkinson's disease, multiple sclerosis, and cerebral palsy.

This disorder is characterized by sustained muscle contractions, often causing twisting or repetitive movements and abnormal postures. Dystonia may be limited to one area (the neck, face, vocal cords, or arms and legs) or may affect the whole body. Dystonia may be both painful and debilitating.

Dystonia can be primary (not caused by something else and possibly inherited) or secondary (a result or symptom of another disorder, injury or medication).