Phenomenology and treatment of tremor disorders

Tremor is classified according to anatomic distribution among body parts, a nd by frequency and amplitude during rest, postural maintenance, movement, intention, and the performance of specific tasks. Key historical features i nclude age at onset, progression over time, family history, exacerbating an d remitting factors and behaviors, response to alcohol and medications, and additional neurological signs and symptoms. Accurate diagnosis is a critic al factor in predicting the natural history and response to treatment.