POSTTRAUMATIC PAROXYSMAL-NOCTURNAL HEMIDYSTONIA

The term ''nocturnal paroxysmal dystonia'' has been used to describe p atients who display paroxysmal episodes of dystonic-dyskinetic movemen ts arising during nonrapid eye movement sleep, in particular stages 2- 3 (Lugaresi E, Cirignotta F. Hypnogenic paroxysmal dystonia: epileptic seizure or a new syndrome. Sleep 1981;4: 129-138). The pathogenesis o f these attacks has remained controversial. We describe a patient with posttraumatic paroxysmal nocturnal hemidystonia. Acetazolamide led to improvement.