Down the Stairs Dystonia-A Novel Task-Specific Focal Isolated Syndrome.

Adult-onset, task-specific dystonia of the lower limb is a rare occurrence. In this report, the authors present 6 cases of task-specific dystonia manifested only when going down the stairs. These patients were seen by 6 different neurologists from across Canada, Australia, and New Zealand, and all videos were reviewed by 1 movement disorders specialist who made the final diagnosis.