What is 'tremor,' in relation to Parkinson's?

What is 'tremor,' in relation to Parkinson's?

Neal Hermanowicz (Director of the Movement Disorders Program) gives expert video advice on: How is dexterity affected by Parkinson's?; How does Parksinson's affect the skin?; How does Parkinson's affect body weight? and more...

Tremor is the single most common symptom that drives people to see the doctor in the first place, where they ultimately receive a diagnosis of Parkinsons disease. Tremor is a rhythmic shaking, usually of a limb, and in Parkinsons disease initially usually of a hand or both hands. The head is rarely affected in terms of shaking. The tremor - and this is an important point - refers to a rhythmic movement, a shaking - not necessarily to any involuntary movement, but this rhythmic movement.