Orthostatic tremor is a high frequency 14–16 Hz tremor of the legs which occurs nearly exclusively while standing and predominantly involves the lower extremities and trunk. Patients usually report unsteadiness but may also experience leg muscle cramps and have a strong need to walk, sit, or lie down to gain relief. The tremor is usually visible but is sometimes more readily palpable in the legs. The tremor may also appear with isometric contraction of upper limbs, jaw, and facial muscles. There is a high incidence of familial postural tremor among patients with orthostatic tremor, but its relationship to essential tremor is uncertain.
KeywordsPublic Health Breast Cancer Internal Medicine Lower Extremity Initial Treatment
Orthostatic tremor.mp4 (MP4 7,646KB)
The patient exhibits high-frequency, irregular tremor of her thighs while standing which disappears while walking and reappears again while standing.