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近年来,电学诊断的发展可对神经根损害作出明确的估价,通过针电极肌电图、F 波、H 反射测定,体躯感觉诱发电位(SEP)记录,可以确定损害程度与平面。针电极肌电图神经根受损后,其支配的肌肉出现异常去神经电位,即纤颤波或正尖波。1～2周先在棘旁肌出现,2～5周在肢体近侧肌出现,6周在远侧肌出现。但出现去神经电位并不是根性损害的唯一表现,病变早期无此电位,主要肌电变化是肌运动单位电位减
In recent years, the development of electrical diagnosis of nerve root damage can make a clear assessment of the needle electrode electromyography, F wave, H reflex determination, somatosensory evoked potential (SEP) record, you can determine the degree of damage and the plane. Electrode EMG nerve root damage, the dominant muscle abnormal denervation potential, that is, fibrillation or positive spikes. 1 ~ 2 weeks first appeared in the paraspinal muscle, 2 to 5 weeks in the proximal limb muscles appear, 6 weeks in the distal muscle. However, the emergence of denervation potential is not the only manifestation of the root damage, early lesions without this potential, the main EMG changes in muscle motor unit potential minus