movement disorder


movement disorder

Any brain-based motor system disorder marked by disturbed muscle movement. These disorders include hemiplegia, ataxia, monoplegia, tremors, rigors, chorea, athetosis, convulsions, spasm (clonic or tonic), reflex (hysterical, habit spasm, tics), and spastic paralysis. Movement disorders are common in the elderly (e.g., those with degenerative neurological diseases). When they occur acutely, they are often caused by a new medication or toxin, stroke, or trauma. See: hyperkinetic disorder; hypokinetic movement disorder