Ninomiya H, Onitsuka T, Chen C H, Sato E, Tashiro N
Department of Neuropsychiatry, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
Psychiatry Clin Neurosci. 1998 Oct;52(5):519-22. doi: 10.1046/j.1440-1819.1998.00445.x.
The P300 event-related potentials in response to self-relevant stimuli has been reported to be different from those to non-target stimuli under a passive attention condition. In the present study the P300 in response to the subject's own face was examined. Twelve right-handed volunteers served as subjects. In two separate conditions, deviant (subject's own face and red square; 30%), non-target (two unfamiliar faces; 30% each), and target (famous face; 10%) stimuli were randomly presented on a computer screen. P300 amplitudes in response to the red square were larger than those to the unfamiliar faces, but were significantly lower than those to the subject's own face. The subject's own face in normal population may have an intense relevance to the subjects which has an additional effect over the simple orienting response.
据报道，在被动注意条件下，对自我相关刺激做出反应的P300事件相关电位与对非目标刺激的反应不同。在本研究中，对受试者自身面部做出反应的P300进行了检测。12名右利手志愿者作为受试者。在两种不同条件下，异常刺激（受试者自身面部和红色方块；30%）、非目标刺激（两张不熟悉的面孔；各30%）和目标刺激（名人面孔；10%）在电脑屏幕上随机呈现。对红色方块做出反应的P300波幅大于对不熟悉面孔的波幅，但显著低于对受试者自身面部的波幅。正常人群中受试者自身的面部可能与受试者有强烈的相关性，这比对简单定向反应有额外的影响。
