MSH: Cyclical movement of a body part that can represent either a physiologic process or a manifestation of disease. Intention or action tremor, a common manifestation of CEREBELLAR DISEASES, is aggravated by movement. In contrast, resting tremor is maximal when there is no attempt at voluntary movement, and occurs as a relatively frequent manifestation of PARKINSON DISEASE.,CSP: involuntary trembling or quivering.,MEDLINEPLUS: <p>Tremors are unintentional trembling or shaking movements in one or more parts of your body. Most tremors occur in the hands. You can also have arm, head, face, vocal cord, trunk and leg tremors. Tremors are most common in middle-aged and older people, but anyone can have them.</p><p>Tremors commonly occur in otherwise healthy people. Sometimes, however, nerve diseases such as <a href=''>Parkinson's disease</a> or <a href=''>dystonia</a>, an overactive thyroid, or certain medicine

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