The tremor of Parkinsons disease characteristically
occurs at rest. Movement typically suppresses the dyskinesia. However,
postural and/or kinetic tremor does not exclude the diagnosis of
Parkinsons disease.6 The resting tremor typically is of low frequency
(4 to 8 Hz). Observation of repetitive stroking of the index finger
across the thumb by patients with the disease has led to the
characterization pill-rolling. Tremor is usually noted in the hands and
arms and, although asymmetric at onset, extends to other extremities as
well as the trunk. An inner tremor, possessing no superficial expression,
has been described and can be a source of substantial discomfort and
disability. The severity of the tremor is modified by factors such as
stress and anxiety.
- Action tremor.
6. Playfer JR. Parkinsonšs disease. Postgrad Med J 1997;73:257-64.
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