A dynamic causal modeling analysis of the effective connectivities underlying top-down letter processing

	A dynamic causal modeling analysis of the effective connectivities underlying top-down letter processing
	Liu, Jiangang 2; Li, Jun 3; Rieth, Cory A.4; Huber, David E.4; Tian, Jie 1,3; Lee, Kang 4,5
发表期刊	NEUROPSYCHOLOGIA
	2011-04-01
卷号	49 期号:5 页码:1177-1186
文章类型	Article
摘要	The present study employed dynamic causal modeling to investigate the effective functional connectivity between regions of the neural network involved in top-down letter processing. We used an illusory letter detection paradigm in which participants detected letters while viewing pure noise images. When participants detected letters, the response of the right middle occipital gyrus (MOG) in the visual cortex was enhanced by increased feed-backward connectivity from the left inferior frontal gyrus (IFG). In addition, illusory letter detection increased feed-forward connectivity from the right MOG to the left inferior parietal lobules. Originating in the left IFG, this top-down letter processing network may facilitate the detection of letters by activating letter processing areas within the visual cortex. This activation in turns may highlight the visual features of letters and send letter information to activate the associated phonological representations in the identified parietal region. (C) 2011 Elsevier Ltd. All rights reserved.
关键词	Letter Processing Word Processing Top-down Processing Fmri Dynamic Causal Modeling
WOS标题词	Science & Technology ; Social Sciences ; Life Sciences & Biomedicine
关键词[WOS]	WORD FORM AREA ; FUSIFORM FACE AREA ; CORTICAL REGIONS ; VENTRAL STREAM ; MENTAL-IMAGERY ; VISUAL-CORTEX ; HUMAN BRAIN ; BOTTOM-UP ; RECOGNITION ; PERCEPTION
收录类别	SCI ; SSCi
语种	英语
WOS研究方向	Behavioral Sciences ; Neurosciences & Neurology ; Psychology
WOS类目	Behavioral Sciences ; Neurosciences ; Psychology, Experimental
WOS记录号	WOS:000290649200042
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ia.ac.cn/handle/173211/3899
专题	中国科学院分子影像重点实验室
通讯作者	Tian, Jie
作者单位	1.Chinese Acad Sci, Inst Automat, Beijing 100190, Peoples R China 2.Beijing Jiaotong Univ, Sch Comp & Informat Technol, Dept Biomed Engn, Beijing 100044, Peoples R China 3.Xidian Univ, Sch Life Sci & Technol, Xian 710071, Peoples R China 4.Univ Calif San Diego, San Diego, CA 92103 USA 5.Univ Toronto, Toronto, ON M5S 1A1, Canada
通讯作者单位	中国科学院自动化研究所
推荐引用方式 GB/T 7714	Liu, Jiangang,Li, Jun,Rieth, Cory A.,et al. A dynamic causal modeling analysis of the effective connectivities underlying top-down letter processing[J]. NEUROPSYCHOLOGIA,2011,49(5):1177-1186.
APA	Liu, Jiangang,Li, Jun,Rieth, Cory A.,Huber, David E.,Tian, Jie,&Lee, Kang.(2011).A dynamic causal modeling analysis of the effective connectivities underlying top-down letter processing.NEUROPSYCHOLOGIA,49(5),1177-1186.
MLA	Liu, Jiangang,et al."A dynamic causal modeling analysis of the effective connectivities underlying top-down letter processing".NEUROPSYCHOLOGIA 49.5(2011):1177-1186.

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