中文摘要：

目的探讨腹直肌肌电图在多发性周围神经病诊断中的作用。方法对109例多发性周围神经病患者进行神经传导研究和肌电图检测，检查肌肉包括腹直肌、第一骨间肌、胫前肌。同时进行正常对照组和肌萎缩侧索硬化组相关研究。比较三组腹直肌肌电图的异同。结果周围神经病组腹直肌肌电图出现神经源性改变，其运动单位电位波幅（451．67±75．01）μV高于正常组[（373．78±56．46）μV，t=2．01，P〈0．04]，低于肌萎缩侧索硬化组[（537．19±159．04）μV，t：2．32，P〈0．03]。结论腹直肌肌电图可用于多发性周围神经病中肋间神经损害的检测。

英文摘要：

Objective To assess the value of electromyography （EMG） of rectus abdominis muscle in the diagnosis of polyneuropathy. Methods 109 patients with polyneuropathy were studied. The routine nerve conduction study was done and standard EMG was recorded from rectus abdominis muscle,first dorsal interosseous muscle and tibialis anterior muscle. The parameters studied included spontaneous activity fibrillation potentials （fib） and positive sharp waves （psw）; duration, amplitude and percentage of polyphasic wave of motor unit action potential （MUAP） and pattern of recruitment. A group of controls and patients with amyotrophic lateral sclerosis （ALS） were studied at the same time. EMG parameters of rectus abdominis muscles were compared among patients with polyneuropathy, patients with ALS and the controls. Results EMG of rectus abdominis muscle in the patients with polyneuropathy showed neurogenic change. The amplitude of motor unit potential in patients with poiyneuropathy（451.67± 75.01 ）μV was higher than that of the controls （ 373.78 ± 56. 46）μV （ t = 2.01, P 〈 0. 04） and lower than that of patients with ALS （537.19 ± 159.04） μV （ t = 2.32,P 〈 0. 03 ）. Conclusion EMG of rectus abdominis muscle might be used to find the lesion of intercostal nerve in polyneuropathy.