利用“大脑中动脉阻塞模型”，以体感诱发电位（ＳＥＰｓ）潜伏期为指标，观察了大鼠大脑中动脉阻塞前后，及阻塞后２小时、４小时的体感诱发电位各值结果，发现大脑中动脉阻塞后２小时、４小时ＳＥＰｓ的潜伏期明显延长。与假手术组比较有明显差异。提示ＳＥＰｓ的潜伏期随梗塞时间延长而延长，说明诱发电位可能是诊断局灶性脑缺血的一个重要指标。 Using middle cerebral artery occlusion model and latent period of somatosensory evoked potentials (SEPs) as indexes, we observed the value of somatosensory evoked potentials before and after middle cerebral artery occlusion in rats and at 2 and 4 hours after occlusion, and found that middle cerebral artery Two hours after the occlusion, the latency of SEPs was significantly prolonged at 4 hours. Compared with the sham group there are significant differences. Suggesting that the latency of SEPs prolongs with the prolongation of infarction, suggesting that evoked potential may be an important indicator of the diagnosis of focal cerebral ischemia.