据报道,运动单位动作电位(MUAP)的波幅和时限受记录肌电图针电极类型的影响。有报道单极针电极记录的波幅较同轴针电极记录的大一倍。诊断肌无力的原因需考虑MUAP 的波幅,因此确定单极针电极和同轴针电极记录的波幅是否存在差别是重要的。有文献报道这两种针电极记录的MUAP It has been reported that the amplitude and duration of the motor unit action potential (MUAP) is influenced by the type of electrode being recorded for the EMG. It has been reported that the amplitude of monopolar needle electrode recording is twice as large as that of coaxial needle electrode. The reason for the diagnosis of muscle weakness needs to take into account the amplitude of the MUAP, so it is important to determine whether there is a difference in the amplitude of the monopolar needle and coaxial needle electrodes. There are reports of MUAP recorded by both needle electrodes