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特发性震颤(essential tremor,ET)是以姿势性或动作性震颤为唯一临床表现、病因未明的中枢神经系统退行性疾病。ET早期仅在精神紧张时出现,经数年后逐渐明显而呈持续性。ET分为家族性和散发
Essential tremor (ET) is the central nervous system degenerative disease whose posture or action tremor is the only clinical manifestation. Early in the ET only appeared when nervous, gradually obvious and persistent after a few years. ET is divided into familial and distribution