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目的：探讨颈髓肿瘤患者的运动诱发电位（ ＭＥＰ） 变化规律。方法：对经磁共振（ ＭＲＩ） 证实的３２例颈髓肿瘤患者进行了电刺激运动诱发电位测试，其中１８ 例进行复查。结果：颈髓肿瘤患者ＭＥＰ 的中枢运动传导时间（ＣＭＣＴ） 延长，异常率为９３ ．８ ％ （３０／３２） ，肌力减退愈重，ＭＥＰ 异常愈显著，颈髓腹侧肿瘤的ＭＥＰ 异常较侧后方肿瘤的 ＭＥＰ 异常更显著，术后 ＭＥＰ 的改变与肌力的改变明显相关。结论：ＭＥＰ 的改变较临床评估更为敏感，且能客观地反映运动功能的损害程度；ＭＥＰ 可预测预后，能作为评估手术效果的客观指标。
Objective: To investigate the changes of motor evoked potentials (MEP) in patients with cervical spinal cord tumors. Methods: Electrical stimulation of motor stimulation was performed in 32 patients with cervical cord tumors confirmed by magnetic resonance imaging (MRI). Among them, 18 cases were reviewed. Results: The median motor conduction time (CMCT) of MEP in patients with cervical spinal cord tumors was prolonged with an abnormality rate of 93%. 8% (30/32). The more severe muscle weakness was, the more obvious MEP was abnormal. The MEP abnormality in cervical ventral tumor was more significant than MEP abnormality in posterior lateral tumor. The postoperative MEP change was obviously correlated with muscle strength change. CONCLUSION: The changes of MEP are more sensitive than clinical assessment, and can objectively reflect the degree of impairment of motor function. MEP can predict the prognosis and can be used as an objective index to evaluate the effect of surgery.