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 ›› 2004, Vol. 36 ›› Issue (06): 697-703.

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短时存贮与复述动态分离的ERP证据

王益文,林崇德,魏景汉,罗跃嘉   

  1. (北京师范大学发展心理研究所,北京 100875)(中国科学院心理研究所心理健康重点实验室,北京 100101)
  • 收稿日期:2004-06-21 修回日期:1900-01-01 出版日期:2004-11-30 发布日期:2004-11-30
  • 通讯作者: 林崇德

EVIDENCE FROM ERP OF DYNAMIC DISSOCIATION OF SHORT-TERM STORAGE AND REHEARSAL

Wang Yiwen,Lin Chongde,Wei Jinghan, Luo Yuejia   

  1. (School of Psychology, Beijing Normal University, Beijing 100875, China) (Key Lab of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China)
  • Received:2004-06-21 Revised:1900-01-01 Published:2004-11-30 Online:2004-11-30
  • Contact: Lin Chongde

摘要: 工作记忆参与信息的短时贮存和操作加工。为了分离参与词语短时存贮与复述的脑区及其时间过程,测量并比较了14名正常青年被试进行汉字2-back、0-back和复述任务时的事件相关电位(ERPs)。结果发现,2-back任务减复述任务在头皮后部出现差异波N430,可能反映了信息的短时存贮及其时间进程。2-back任务减0-back任务在头皮前部得到的持续负成分SNC可能是复述加工的动态指标。SNC和N430持续时间的重叠提示,大脑额叶和后部区域分别参与信息的复述和短时存贮,两者的动态分离加工可能是工作记忆中暂时保持的神经基础。

关键词: 工作记忆, 短时存贮, 复述, N-back任务, 事件相关电位

Abstract: Working memory (WM) is a system that is used for temporary storage and manipulation of information. For dissociate the brain areas involved in verbal storage and rehearsal, event-related brain potentials were measured when 14 normal young participants were performing 2-back task, 0-back task and rehearsal task of Chinese characters. The difference wave N430 appeared at the posterior of the scalp by subtraction of ERP in the rehearsal task from that in 2-back task, which probably reflected the short-term storage and its time-course. The difference wave of sustained negative component (SNC) appeared at the anterior of the scalp by subtraction of ERP in 0-back task from that in 2-back task, which is a likely dynamic index of rehearsal processes. Frontal lobe and posterior areas of brain maybe govern the rehearsal and short-term storage, respectively. The dynamic division of both areas possibly is neural base of temporarily maintaining in verbal WM.

Key words: working memory, short-term storage, rehearsal, n-back task, event-related potentials (ERPs)

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