A benign neurological disorder in which twisting and repetitive or sustained but unwanted muscle contraction occurs in a body part. It can affect a specific muscle (focal dystonia), a region of the body (regional dystonia), or even the body as a whole (generalized dystonia).
Common focal dystonias include laryngeal (spasmodic dysphonia or respiratory dystonia); ocular (blepharospasm); neck or cervical (torticollis and related neck disorders); and limb dystonia (writer’s cramp). Treatment for focal dystonias is most commonly via Botox™ injection into affected muscles, and occasionally by selective denervation. More regional and generalized dystonias may respond to a variety of systemic medications such as clonazepam and others.