Nowicka Anna, Jednoróg Katarzyna, Wypych Marek, Marchewka Artur
Nencki Institute of Experimental Biology, Department of Neurophysiology, Laboratory of Psychophysiology, 3 Pasteur Street, 02-093 Warsaw, Poland.
Int J Psychophysiol. 2009 Feb;71(2):97-102. doi: 10.1016/j.ijpsycho.2008.06.009. Epub 2008 Jul 5.
The present study investigated, using the item-method directed forgetting paradigm, whether successful intentional forgetting is reflected in brain activity, as measured by ERP. We sorted the EEG data into 4 experimental conditions based on the combination of memory instruction and behavioral outcome: TBF_F (to-be-forgotten and forgotten), TBF_R (to-be-forgotten but remembered), TBR_R (to-be-remembered and remembered, i.e. hits) and correct rejections (CR). TBR_R trials elicited a typical old/new effect (approximately 500-750 ms poststimulus) over central and parietal regions. The TBF_F condition, however, elicited ERP that were more negative-going than ERP for CR (the reversed old/new effect). The latter may reflect the very effective inhibition of encoding and retrieval processes. This indicates that intentional processes leading to successful forgetting significantly influence brain activity.
本研究采用项目法定向遗忘范式,探讨了成功的有意遗忘是否会在通过事件相关电位(ERP)测量的大脑活动中得到体现。我们根据记忆指令和行为结果的组合,将脑电图(EEG)数据分为4种实验条件:待遗忘且被遗忘(TBF_F)、待遗忘但被记住(TBF_R)、待记住且被记住(即命中,TBR_R)以及正确拒识(CR)。TBR_R试验在中央和顶叶区域引发了典型的新旧效应(刺激后约500 - 750毫秒)。然而,TBF_F条件下引发的ERP比CR条件下的ERP更偏向负向(反向的新旧效应)。后者可能反映了对编码和检索过程的有效抑制。这表明导致成功遗忘的有意过程会显著影响大脑活动。