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July 25, 2011
Palatal myoclonus—or palatal tremor—refers to involuntary rhythmic contractions of the soft palate, sometimes accompanied by ocular, oropharyngeal or diaphragmatic myoclonus. Patients commonly complain of an audible "clicking" sound. Palatal myoclonus is exceptional among movement disorders because it often persists during sleep. "Symptomatic" palatal myoclonus results from lesions in the Guillain-Mollaret triangle (formed by the dentate nucleus, red nucleus and inferior olivary nucleus) and is often associated with olivary hypertrophy. Strokes account for the majority of such cases. This is in contrast to "essential" palatal myoclonus where there is no demonstrable cause. This type accounts for about 25% of cases.
Dr. Bhavpreet Dham
Disclosure: Dr. Dham has no disclosures.
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