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对46例健康成人,30例缺血性脑血管疾病、10例局灶性皮质病变病人进行4或5道记录,研究正中神经短潜伏期躯体感觉诱发电位(SEP)头部分布。顶 N20波、前额 P20波与中央前 P22波的时间-空间特征明显不同;在缺血性脑血管疾病中,中央前成分异常率(80%)明显比顶成分(30%)高,X~2=9.3,P<0.01;局灶性皮质病变,顶 N20-前额 P20与中央前 P22出现分离性异常现象。多道记录可以明确区分中央前 P22与前额 P20,顶 N20-前额 P20与中央前 P22有不同的神经起源,中央前 P22对缺血性脑血管疾病是一种敏感的诊断指标,同时记录这几个成分将提高 SEP 的诊断敏感性。
46 cases of healthy adults, 30 cases of ischemic cerebrovascular disease, 10 cases of focal cortical lesions were recorded 4 or 5 to study the median nerve short latency somatosensory evoked potential (SEP) head distribution. In the ischemic cerebrovascular disease, the anomalous rate of central anterior component (80%) was significantly higher than that of the top component (30%), while the peak value of N20 wave, forehead P20 wave and central P22 wave were significantly different. 2 = 9.3, P <0.01; focal cortical lesions, the top N20-prefrontal P20 and the separation of the former P22 anomalies. Multi-channel recording clearly distinguishes central frontal P22 from forehead P20, top N20-prefrontal P20 and central frontal P22 have different neural origins. Central P22 is a sensitive diagnostic marker of ischemic cerebrovascular disease and records these The components will improve the diagnostic sensitivity of SEP.