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本文报告２１例单侧肢体肌萎缩症的临床和肌电图改变。平均起病年龄２３．０４岁，男：女＝３．２：１，肌萎缩局限于某一个肢体，４４块被检肌中３９块（８８．６％）出现运动单位时限延长，２６块（５０．１％）波幅增高。９块肌肉（２０．４％）出现纤颤电位，５块（１１．４％）出现巨大电位。
This article reports 21 cases of unilateral muscular dystrophy clinical and electromyographic changes. The average age of onset was 23.04 years. The average age of onset was 23.04 years old. The average age of onset was 23.22 years. Muscular atrophy was confined to one limb. 39 (88.6% 50.1%) increased volatility. Nine muscles (20.4%) showed fibrillation potential, five (11.4%) showed a huge potential.