tremor

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tremor (trem-er) n. a rhythmical alternating movement that may affect any part of the body. essential t. a slow tremor that particularly affects the hands and arms when held out. intention t. tremor that occurs when a patient with disease of the cerebellum tries to touch an object. physiological t. a feature of the normal mechanism for maintaining posture. It may be more apparent in states of fatigue or anxiety or in people with an overactive thyroid gland. resting t. tremor that occurs only when the patient is at rest and disappears when movement is attempted. It is a prominent symptom of parkinsonism.

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