ISSN 0439-755X
CN 11-1911/B
主办:中国心理学会
   中国科学院心理研究所
出版:科学出版社

心理学报 ›› 2005, Vol. 37 ›› Issue (06): 723-728.

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额叶参与执行控制的ERP负荷效应

王益文,林崇德   

  1. 山东师范大学心理学系,济南 250014  北京师范大学发展心理研究所,北京 100875
  • 收稿日期:2005-05-25 修回日期:1900-01-01 出版日期:2005-11-30 发布日期:2005-11-30
  • 通讯作者: 林崇德

Frontal Involvement to Executive Control: Load Effects Reflected by

Wang-Yiwenm,--Lin-Chongde   

  1. Department of Psychology, Shandong Normal University, Jinan 250014  Institute of Developmental Psychology, Beijing Normal University, Beijing 100875
  • Received:2005-05-25 Revised:1900-01-01 Published:2005-11-30 Online:2005-11-30
  • Contact: Lin Chongde

摘要: 为了检测执行控制的激活脑区及其时间进程,测量了14名健康成人被试执行汉字1/2/3-back任务时的64导事件相关电位(ERPs)。1/2/3-back任务均在头皮前部诱发N360,从刺激消失250ms起至600ms左右结束,其波幅表现出随记忆负荷而增高的负荷效应。3-back任务N360源分析发现位于额叶等部位的高密度电流分布和偶极子,表明左右半球均参与执行控制,但左侧额叶具有相对的半球优势。

关键词: n-back任务, 执行控制, 负荷效应, 事件相关电位, 偶极子源定位

Abstract: In order to explore the cerebral areas activated by 1/2/3-back tasks of Chinese characters and the time-course of executive control, the 64 channels event-related potentials (ERPs) of 14 normal adults were measured. N360 was elicited by 1/2/3-back tasks at prefrontal scalp. The duration of the N360 was from 250ms to 600ms after stimuli occurred. The peak-to-peak amplitude of the N360 increased with the memory load enhancement and showed load effects. High ER density current distributions and three dipoles located in the frontal lobe and other areas were found by source analysis to the N360 of 3-back tasks. Results suggest that both hemispheres involved in the executive control at different extents, but the left frontal lobe has a relative hemispherical dominance.

Key words: n-back task, executive control, load effect, event-related potentials (ERPs), dipole source localization

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