腹直肌肌电图运动单位电位正常值的建立

Establishment of the normative value of motor unit action potentials of rectus abdominis muscles

目的:建立腹直肌肌电图(EMG)运动单位动作电位(MUAP)各参数正常值。方法:测定109例正常人腹直肌EMG的MUAP的时限、波幅及多相波。结果:腹直肌EMG的MUAP参数分别为:波幅373．78±56．46μV,时限9．95±1．13 ms,多相波19．40％±1．52％。结论:腹直肌EMG各参数能可靠、稳定地测出,有助于脊髓胸段下运动神经元病变的检测。

Objective：To establish＂ the normative value of motor unit action potentials（MUAP） of rectus abdominis muscles. Methods：The standard EMG was recorded from rectus abdominis muscles including duration,amplitude and percentage of polyphasic waves of MUAP in 109 normative subjects. Resuits：The normative value of MUAP of rectus abdominis muscles were： amplitude 373.78±56.46μV,duration 9.95 ± 1.13ms, polyphasic waves 19.40 ± 4.52 % respectively. Conclusions： Parameters of EMG of rectus abdominis muscle can be detected reliably and are helpful for the diagnosis of lesion in lower motor neuron involved in the thoracic region.