Top-Down Modulations from Dorsal Stream in Lexical Recognition: An Effective Connectivity fMRI Study

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	Top-Down Modulations from Dorsal Stream in Lexical Recognition: An Effective Connectivity fMRI Study
	Deng, Yuan1 ; Guo, Ruifang 2,3; Ding, Guosheng 2; Peng, Danling 2
刊名	PLOS ONE
	2012-03-13
卷号	7 期号:3
ISSN号	1932-6203
通讯作者	Deng, Y (reprint author), Chinese Acad Sci, Key Lab Behav Sci, Inst Psychol, Beijing, Peoples R China.
产权排序	1
英文摘要	Both the ventral and dorsal visual streams in the human brain are known to be involved in reading. However, the interaction of these two pathways and their responses to different cognitive demands remains unclear. In this study, activation of neural pathways during Chinese character reading was acquired by using a functional magnetic resonance imaging (fMRI) technique. Visual-spatial analysis (mediated by the dorsal pathway) was disassociated from lexical recognition (mediated by the ventral pathway) via a spatial-based lexical decision task and effective connectivity analysis. Connectivity results revealed that, during spatial processing, the left superior parietal lobule (SPL) positively modulated the left fusiform gyrus (FG), while during lexical processing, the left SPL received positive modulatory input from the left inferior frontal gyrus (IFG) and sent negative modulatory output to the left FG, These findings suggest that the dorsal stream is highly involved in lexical recognition and acts as a top-down modulator for lexical processing.
学科主题	Cognitive psychology
收录类别	SCI
项目简介	This work was supported by grants from National Nature Science Foundation of China (NSFC, 31170969, 30870757, 30700232) and Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT). The funders had no role in study, design, data collection and analysis, decision to publish, or preparation of the manuscript.
原文出处	http://www.plosone.org/article/fetchObject.action?uri=info:doi/10.1371/journal.pone.0033337&representation=PDF
语种	英语
WOS记录号	WOS:000303129700054
内容类型	期刊论文
源URL	[http://ir.psych.ac.cn/handle/311026/13317]
专题	心理研究所_中国科学院心理健康重点实验室
作者单位	1.Chinese Acad Sci, Key Lab Behav Sci, Inst Psychol, Beijing, Peoples R China 2.Beijing Normal Univ, State Key Lab Cognit Neurosci & Learning, Beijing 100875, Peoples R China 3.Changzhi Med Coll, Changzhi, Shanxi, Peoples R China
推荐引用方式 GB/T 7714	Deng, Yuan,Guo, Ruifang,Ding, Guosheng,et al. Top-Down Modulations from Dorsal Stream in Lexical Recognition: An Effective Connectivity fMRI Study[J]. PLOS ONE,2012,7(3).
APA	Deng, Yuan,Guo, Ruifang,Ding, Guosheng,&Peng, Danling.(2012).Top-Down Modulations from Dorsal Stream in Lexical Recognition: An Effective Connectivity fMRI Study.PLOS ONE,7(3).
MLA	Deng, Yuan,et al."Top-Down Modulations from Dorsal Stream in Lexical Recognition: An Effective Connectivity fMRI Study".PLOS ONE 7.3(2012).