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诱发电位是一种新的神经系统检查方法,为了将其用于临床,首先要搞清诱发电位的正常波形,各波分布范围和起源,本文重点阐明正中神经体感诱发电位各波的分布和起源。一、正中神经体感诱发电位的检查方法 (一)刺激方法:常用的刺激方式为电刺激或机械刺激。刺激部位常选在腕部正中神经表面皮肤或桡侧三指,腕部电刺激常用一对置于正中神经表面相距2～3 cm的表面电极,阴极在近心端,刺激强度以拇短展肌出现轻微收缩为度。刺激电脉冲的持续时间为0.1～0.5msec,刺激频率以1～2.5次/秒为宜。手指电刺激可用环状电极刺激桡侧三
Evoked potential is a new neurological examination method, in order to be used in clinical, we must first find out the normal waveform of evoked potential, the distribution of the wave and the origin, the focus of this paper to clarify the median nerve somatosensory evoked potential wave distribution and origin . First, the median nerve somatosensory evoked potentials (a) stimulation method: commonly used stimulation for electrical stimulation or mechanical stimulation. Stimulation site is often selected in the middle of the wrist nerve surface of the skin or radial three fingers, wrist electrical stimulation commonly used in a pair of placed in the median nerve surface 2 ~ 3 cm away from the surface of the electrode, the cathode in the proximal end of the stimulus to thumb short Muscle showed a slight contraction to degrees. The duration of the stimulus pulse is 0.1 to 0.5 msec, and the stimulus frequency is preferably 1 to 2.5 times / sec. Finger electrical stimulation can be used to stimulate the radial electrode ring three