Laurian S, Bader M, Lanares J, Oros L
Clinique Psychiatrique, Universitaire de Lausanne, Switzerland.
Int J Psychophysiol. 1991 Jan;10(3):231-8. doi: 10.1016/0167-8760(91)90033-t.
This experiment was intended to explore the effects of the emotional connotation of stimuli on the hemispheric lateralization. Ten right-handed male subjects (Ss) were presented a set of slides of faces expressing a positive emotion, a negative emotion or emotional neutrality. The ERPs elicited by the face stimuli were recorded from 16 leads and topographic maps of P3 amplitude were created. The results show that when Ss had to discriminate between emotional (target) and neutral (non-target) faces, the main differences were seen predominantly over the right centroparietal area. On the contrary, when Ss had to detect a face particularity not related to the emotional content, the differences between target and non-target faces were bilaterally distributed. The present results support the hypothesis that the perception of emotional expressions is processed mainly by the right hemisphere.
本实验旨在探究刺激的情感内涵对半球侧化的影响。向10名右利手男性受试者呈现一组表达积极情绪、消极情绪或情绪中立的面部幻灯片。从16个导联记录面部刺激引发的事件相关电位（ERP），并创建P3波幅的地形图。结果表明，当受试者必须区分情绪化（目标）和中性（非目标）面孔时，主要差异主要出现在右侧中央顶叶区域。相反，当受试者必须检测与情感内容无关的面部特征时，目标面孔和非目标面孔之间的差异是双侧分布的。目前的结果支持了这样一种假设，即情感表达的感知主要由右脑半球处理。
