The postural tremor was the main manifestation of essential tremor,tremor affected hand in 92.5% patients,throat in 21.3%,head in 20%,chin in 17.5%.

• 临床主要表现为单症状的姿势性震颤 ；累及部位依次为手 (92 .；5%25 )、咽喉部 (2 1