Other Focal Dystonias
Rare forms of focal, typically adult-onset, dystonia have been described, including the following:
- Truncal dystonia. Dystonic spasms may cause unusual stretching, bending, or twisting of the trunk, sometimes accompanied with sideways curvature of the spine (scoliosis). At symptom onset, the spasms may occur only with standing or walking. Eventually, symptoms may also be present during rest. Dystonic spasms may eventually extend to involve adjacent regions, such as muscles of the upper arms or legs or the pelvis.
- Abdominal wall dystonia. Also known as "belly-dancer's dyskinesia," this condition is characterized by sustained contractions and involuntary, writhing movements of the abdominal wall.
