作　　者： ; ; ; ; ;

机构地区： 北京师范大学心理学院发展心理研究所

出　　处： 《心理学报》 2004年第3期253-259,共7页

摘　　要： 测量了 14名正常青年被试在进行延迟反应任务时的事件相关脑电位 (ERP)。在刺激消失后的延迟阶段 ,汉字任务和空间任务均在头皮前部额区产生P2 6 0和晚期正成分 (LPC) ,在头皮后部顶枕区产生N15 0和晚期负成分 (LNC)。汉字任务的P2 6 0为右半球优势 ,4 0 0～ 80 0ms转化为左半球的激活程度显著大于空间任务。空间任务从P2 6 0的左右半球均衡变化为 4 0 0～ 80 0ms的右半球优势。头皮后部无显著差异。研究结果提供了工作记忆中汉字与空间信息保持的分离及其优势半球动态变化的电生理学证据。 Event-related brain potentials were measured when 14 normal young participants were performing delay response tasks. During the delay interval after the disappearance of Chinese characters and spatial stimulus, P260 and late positive component(LPC) were generated in centro-frontal areas, N150 and late negative component(LNC) were elicited in parieto-occipital areas. Chinese character task changed from the right hemispheric dominance indicated by P260 to the more activation than spatial task between 400～800ms at the centro-anterior areas. Spatial task changed from the balance of brain hemispheres to right hemispheric dominance. The posterior of scalp have not difference. The results provided electrophysiologic evidences of dissociation and dynamic hemispheric dominance of maintaining Chinese characters and spatial Information in working memory.

关 键 词： 工作记忆 汉字与空间信息 优势半球 延迟匹配任务 事件相关电位

领　　域： [哲学宗教] [哲学宗教]