Head tremor in Parkinson's disease.

Head tremor is a typical feature of essential tremor. Patients with sporadic Parkinson's disease can have tremor of the tongue, lip, or chin, but classically do not have head tremor. We describe five patients with Parkinson's disease and head tremor in whom clinical and neurophysiological findings suggested that head tremor was a manifestation of Parkinson's disease. (c) 2006 Movement Disorder Society