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A cerebellar tremor is a type of intention tremor caused by lesions or damage to the cerebellum from a stroke, tumor, or disease, such as multiple sclerosis. It may also be the result of chronic alcoholism or overuse of certain medications.
Essential tremor is thought to be caused by electrical fluctuations in the brain that send abnormal signals out to the muscles. Several areas of the brain have been implicated in generating these abnormal signals. The signals travel through a variety of brain regions before they make it out to muscles.