目的初步研究运动神经传导速度(motornerveconductionvelocity,MNCV)检查相关指标与肌力(musclepower,MP)的关系,评测MNCV检查在神经损伤的法医学鉴定中的价值。方法以22例正中神经损伤病例为对象,进行MNCV和MP检查;另将22例健康受试者作为对照组,在同条件下进行检查。MNCV测定指标包括:远、近端潜伏期,远、近端波幅,MNCV值。测定前,由同一操作医师测定患者相应的MP(拇短展肌、拇短屈肌、拇指对掌肌)。结果患病组内,MP与MNCV和远近端波幅值存在显著相关性,而对照组内MP与其他指标无任何相关性;两组间对比,各项指标均存在明显差异。结论正中神经损伤后,手部相应肌肉的MP丧失程度与MNCV改变相关,并且MNCV各项指标发生显著改变。结果表明,MNCV检验可为神经损伤后MP丧失程度的法医学检查及其鉴定提供客观证据。 Objective To study the relationship between motor nerve conduction velocity (MNCV) and musclepower (MP) and evaluate the value of MNCV in the forensic identification of nerve injury. Methods Twenty-two patients with central nerve injury were selected for MNCV and MP examination. Twenty-two healthy subjects were included as control group under the same conditions. MNCV measurement indicators include: far, proximal latency, far, proximal amplitude, MNCV value. The patient’s corresponding MP (thumb extensor, flexor hallucis, thumb paw) was determined by the same surgeon before the test. Results There was a significant correlation between the MP and MNCV and the amplitude of near and far endpoints in the diseased group, while there was no correlation between MP and other indexes in the control group. There were significant differences between the two groups in the indexes. Conclusions After the median nerve injury, the degree of MP loss in the corresponding muscle of the hand is related to the change of MNCV, and the indexes of MNCV are significantly changed. The results show that the MNCV test can provide objective evidence for forensic examination and identification of MP loss after nerve injury.