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目的：研究运动诱发电位（MEP）检查对运动神经元病（MND）的临床诊断价值。方法：应用运动诱发电位（MEP）技术检查21例运动神经元病（MND）患者。结果：肌萎缩侧索硬化症（ALS）、原发性侧索硬化症（PLS）和进行性脊肌萎缩症（SPMA）中枢运动神经传导时间（CMCT）延长分别占87．50％、11％和15.0％，MEP异常率（包括潜伏期及CMCT延长）分别为95．0％，95．83％和5．0％。结论：MEP的主要价值是检查中枢运动传导功能，能为MND的诊断及其临床分型提供客观依据。
Objective: To investigate the value of motor evoked potential (MEP) in the diagnosis of motor neuron disease (MND). Methods: Twenty-one patients with motor neuron disease (MND) were examined with motor evoked potentials (MEP). Results: ALT, PLS and SPMA increased the motor nerve conduction time (CMCT) by 87.50%, 11% And 15.0% respectively. The MEP anomalies (including latency and CMCT extension) were 95.0%, 95.83% and 5.0% respectively. Conclusion: The main value of MEP is to check the central motor conduction function, which can provide an objective basis for the diagnosis of MND and its clinical classification.