ISSN 0439-755X
CN 11-1911/B

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

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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

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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