Electrophysiological observations on an unusual, task specific jaw tremor
- Dr JC Rothwell, MRC Human Movement and Balance Unit, The Institute of Neurology, Queen Square, London WC1N 3BG, UK.
Abstract
A patient with no other neurological signs or symptoms presented with a prominent tremor restricted to the mandible. This 5-6 Hz tremor was interesting in that it was normally confined to the digastric muscles and was highly task specific. In the course of her normal daily activities, it began only when the patient drank from a cup or glass. The localisation of this tremor to a muscle that has no muscle spindles and no reciprocal inhibitory reflexes suggests that such tremors must be capable of being generated centrally.
