经颅电刺激运动皮层的运动诱发电位（——evokal叫规M，MEP）是八十年代应用于临床的一项监测中枢运动传导通路的新技术t’1。它具有刺激器轻便、价格便宜，反复刺激后不发热，描记的波形稳定等特点，已经广泛用于实验室和临床工作。本文就其技术的发展、生理学基础、安全性及 Transcranial electrical stimulation of motor cortex motor evoked potentials (-evokal called M, MEP) is the clinical application in the eighties a central monitoring of motor conduction pathway t’1 new technology. It has stimulator light, cheap, repeated stimulation is not hot, tracings stable waveform characteristics, has been widely used in laboratory and clinical work. This article on the development of its technology, physiology, safety and foundation