【摘要】目的初步研究运动神经传导速度(motor nerve conduction velocity，mncv)检查相关指标与肌力(muscle power，
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；两组问对比，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。
【关键词】法医临床学；mncv；正中神经损伤；法医学鉴定；
【中图分类号】d919．4
【文献标识码】a
i文章编号】1007—9297(2006)01—0043—03
relationship between mncv and the change of limb muscle power due to median nerve injury．li k吐zhu xin-j
xu yong-cheng．zhang qin-chu．medical college ofxi 帆jiaotong university,forensic department，shann x，xi an 710061
【abstract】 ive to study the relationship between motor nerve conduction velocity(mncv)and the change of limb
muscle power(mp)due to median nerve i~ury；to assess the forensic medical value of mncv tests for detecting median nerve in—
jury．methods 22 patients with median nerve injury are compared with 22 healthy controls in terms of distant and near latency，
distant and near wave amplitude and mncv．mp of patients including abductor pollicis brevis，flexor hallucis brevis and opponens
pollicis are examined before mncv tests．results mp is related with mncv and wave amplitude in the patient group，while no re—
lationship is found in the controls．all the selected measurements show significantly diference between the two groups．conclusion
loss of mp is related with the change of mncv due to median nerve injury．all the selected measurements become significantly ab—
normal after median nerve injury．mncv tests can provide reliable ive evidence for medicolegal examination and assessment
forloss ofmp．
【key words】forensic clinical science；mncv；median nerve injury；medicolegal expertise
肌力丧失程度是法医损伤程度及伤残等级鉴定
的重要参考指标。现行的肌力检查标准是根据临床肌
力检查法制订，具有主观性，在法医检查时偶见被检
人伪装肌力丧失严重。因此有必要借助客观方法进行
确证。肌电图检查是评价外周神经损伤的客观方法，
其中运动神经传导速度(motor nerve conduction ve．
1ocity，mncv)~定可反映损伤部位和程度，具有客观
性。本文以正中神经损伤为例，初步探讨mncv与肌
力丧失程度的相关性。
对象和方法
一
、对象
以22例前臂正中神经损伤病例作为损伤组，所
有病例均为男性，年龄在l7—60岁间，处于损伤后5-6
个月期间．均有明确的上肢外伤史．无影响神经系统
正常功能