Parkinsonian tremor
Parkinsonian tremor is a 4-8 Hz tremor that is of variable amplitude. It may precede the rigidity of the condition by a time course of months to years. It is usually present when the limb is at rest - 'static tremor' although 50% of patients have a postural component.
Primary features include:
- aggravation by resting, walking, the use of other limbs
- the tremor disappears when the patient is asleep
- a degree of voluntary control over the tremor - the patient may attempt to control it by tightly gripping a rolled up newspaper or another object
- typically, the tremor could be either of,
- a flexion-extension elbow movement
- a pronation-supination of the forearm
- a pill-rolling finger movement. (1)
- rarely the head - flexion and extension; rarely the mandible - rhythmical opening of mouth
- may be unilateral
Reference
- Bohlega S et al. Tremor in Parkinson's Disease: From Pathophysiology to Advanced Therapies. Tremor Other Hyperkinet Mov (NY). 2022 Sep 13:12:29.
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