"Rubral" tremor induced by a neuroleptic drug.

"Rubral" tremor is a rare movement disorder that occurs typically with midbrain damage. It is defined by its presence at rest, with sustained posture, and with movement. Whether it is a single-tremor disorder or a combination of two distinct tremors is debated. This report chronicles a severe neuroleptic induced "rubral" tremor in a patient who had had a stable posttraumatic ataxia. The dramatic response to benztropine and bromocriptine is illustrated in the videotape.