本文应用ＳＥＭ—４２０１型神经兴奋测试仪，对国人额肌、眼肌、口肌进行测试，得出各肌强度—时间曲线的正常阈值。通过各肌间阈值对比，得出眼肌阈值＜额肌阈值＜口肌阈值的结果，即眼支运动点兴奋性最大，最易受损伤。又对１６５例面瘫病人进行测试发现，眼肌失神经支配最多、程度最重 In this paper, SEM-4201 nerve excitement tester, the amount of muscle, eye muscle, muscle were tested, the muscle strength - time curve of the normal threshold. By comparing the threshold between the muscles, the result is that the threshold of the eye muscle is less than the threshold of the frontal muscle and the threshold of the muscle of the mouth, that is, the excitability of the eye movement is the largest and most vulnerable. Again 165 cases of patients with facial paralysis test found that the largest loss of the optic nerve, the degree of the most