Sustained activity within the default mode network during an implicit memory task

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	Sustained activity within the default mode network during an implicit memory task
	Yang, Jionjiong 1; Weng, Xuchu2 ; Zang, Yufeng 3; Xu, Mingwei 2; Xu, Xiaohong 1
刊名	CORTEX
	2010-03-01
通讯作者邮箱	yangjj@pku.edu.cn
卷号	46 期号:3 页码:354-366
关键词	Default mode network Unconscious processing Implicit memory
ISSN号	0010-9452
通讯作者	Jiongjiong Yang
产权排序	2
英文摘要	Recent neuroimaging studies have shown that several brain regions - namely, the posterior cingulate cortex (PCC), ventral medial prefrontal cortex (vmPFC), and the bilateral angular gyrus - are more active during resting states than during cognitive tasks (i.e., default mode network). Although there is evidence showing that the default mode network is associated with unconscious state, it is unclear whether this network is associated with unconscious processing when normal human subjects perform tasks without awareness. We manipulated the level of conscious processing in normal subjects by asking them to perform an implicit and an explicit memory task, and analyzed signal changes in the default mode network for the stimuli versus baseline in both tasks. The functional magnetic resonance imaging (fMRI) analysis showed that the level of activation in regions within this network during the implicit task was not significantly different from that during the baseline, except in the left angular gyrus and the insula. There was strong deactivation for the explicit task when compared with the implicit task in the default mode regions, except in the left angular gyrus and the left middle temporal gyrus. These data suggest that the activity in the default network is sustained and less disrupted when an implicit memory task is performed, but is suspended when explicit retrieval is required. These results provide evidence that the default mode network is associated with unconscious processing when human subjects perform an implicit memory task. (c) 2009 Elsevier Srl. All rights reserved.
学科主题	认知心理学
收录类别	SCI
语种	英语
WOS记录号	WOS:000275146500009
内容类型	期刊论文
源URL	[http://ir.psych.ac.cn/handle/311026/13752]
专题	心理研究所_中国科学院心理研究所回溯数据库(1956-2010)
作者单位	1.Peking Univ, Dept Psychol, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Psychol, Lab Higher Brain Funct, Beijing 100101, Peoples R China 3.Beijing Normal Univ, State Key Lab Cognit Neurosci & Learning, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Yang, Jionjiong,Weng, Xuchu,Zang, Yufeng,et al. Sustained activity within the default mode network during an implicit memory task[J]. CORTEX,2010,46(3):354-366.
APA	Yang, Jionjiong,Weng, Xuchu,Zang, Yufeng,Xu, Mingwei,&Xu, Xiaohong.(2010).Sustained activity within the default mode network during an implicit memory task.CORTEX,46(3),354-366.
MLA	Yang, Jionjiong,et al."Sustained activity within the default mode network during an implicit memory task".CORTEX 46.3(2010):354-366.