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; Jiongjiong Yang
通讯作者邮箱	yangjj@pku.edu.cn
心理所单位排序	2
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.
关键词	Default mode network Unconscious processing Implicit memory
学科领域	认知心理学
	2010-03-01
语种	英语
发表期刊	CORTEX
ISSN	0010-9452
卷号	46 期号:3 页码:354-366
期刊论文类型	Article
收录类别	SCI
WOS记录号	WOS:000275146500009
引用统计	被引频次：26[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.psych.ac.cn/handle/311026/13752
专题	中国科学院心理研究所回溯数据库(1956-2010)
通讯作者	Jiongjiong Yang
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,&Jiongjiong Yang.(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.

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