报告单双侧正中神经刺激－顶导联ＳＥＰ检测４３例单侧半球病灶结果，双侧法病灶检出率（９０．７％）高于单侧法（７９．１％），适用于检测脑叶病灶和小病灶。基底节区病灶额顶导联异常，常有无反应型或早成份异常，中央沟前病灶额区ＳＦＰ异常，中央沟后病灶主要是顶区ＳＦＰ异常。额前病灶或越靠后以及小病灶，ＳＥＰ改变可不明显，甚至可以正常，额－顶导联应用有助于区分半球不同部位的病灶。 Report single bilateral median nerve stimulation - top lead SEP detection of 43 cases of unilateral hemispheric lesions results, the bilateral lesion detection rate (90.7%) was higher than unilateral (79.1%), suitable for detection of brain Leaf lesions and small lesions. Basal ganglia lesion top lead abnormalities, often non-reactive or early components of anomalies, central frontal fissure area SFP anomalies, the central ditch lesions mainly in the top SFP anomalies. Prefrontal or more posterior and minor lesions, SEP changes may not be obvious, or even normal, forehead - lead application helps distinguish the different parts of the hemisphere lesions.