The many forms of tremor. Precise classification guides selection of therapy.

PREVIEWTremor is a common, potentially disabling symptom that occurs with a variety of neurologic conditions. Rational therapy is enhanced by correct identification of the tremor type and, when possible, of its cause. In this review, the basic phenomenology of tremor is presented, followed by an examination of the most common tremor types and their treatment. Surgical therapy for medically refractory tremor is discussed.