肌阵挛是由于肌肉的一部或全部短时间急剧地收缩引起的一种不自主运动。其中仅限于软颚的叫软颚肌阵挛。1886年Spencer首先描述本症以来,已有许多报告。本文中的软颚肌阵挛是指每分钟120～140次左右的规则而持续地不自主运动,并且不仅限于软颚,往往扩展到咽、喉、膈等肌肉。一般认为其主要病灶在肌阵挛同侧的小脑齿状核、对侧的红核、下橄榄核等连结成的叫Guillain-Mollaret三角区域,其原发疾病多为 Myoclonus is a type of involuntary movement caused by a sharp contraction of one or both of the muscles for a short period of time. Which is limited to soft jaw called soft jaw muscle clonus. Since Spencer first described the disease in 1886, there have been many reports. In this paper, the soft jaw myoclonus refers to the regular 120 to 140 times per minute and continuously involuntary movements, and is not limited to the soft jaw, often extended to the pharynx, larynx, diaphragm and other muscles. It is generally believed that the main lesion in the same side of myoclonus cerebellar dentate nucleus, the contralateral red nucleus, the lower olivary nucleus and other connected into the called Guillain-Mollaret triangular region, the primary disease are mostly