Neural correlates of top-down letter processing

	Neural correlates of top-down letter processing
	Liu, Jiangang 6; Li, Jun 5; Zhang, Hongchuan 3; Rieth, Cory A.1; Huber, David E.1; Li, Wu4 ; Lee, Kang 1,2; Tian, Jie 4,5
发表期刊	NEUROPSYCHOLOGIA
	2010
卷号	48 期号:2 页码:636-641
文章类型	Article
摘要	This fMRI study investigated top-down letter processing with an illusory letter detection task. Participants responded whether one of a number of different possible letters was present in a very noisy image. After initial training that became increasingly difficult, they continued to detect letters even though the images consisted of pure noise, which eliminated contamination from strong bottom-up input. For illusory letter detection, greater fMRI activation was observed in several cortical regions. These regions included the precuneus, an area generally involved in top-down processing of objects, and the left superior parietal lobule, an area previously identified with the processing of valid letter and word stimuli. In addition, top-down letter detection also activated the left inferior frontal gyrus, an area that may be involved in the integration of general top-down processing and letter-specific bottom-up processing. These findings suggest that these regions may play a significant role in top-down as well as bottom-up processing of letters and words, and are likely to have reciprocal functional connections to more posterior regions in the word and letter processing network. (C) 2009 Elsevier Ltd. All rights reserved.
关键词	Word Processing Letter Processing Top-down Processing Fmri
WOS标题词	Science & Technology ; Social Sciences ; Life Sciences & Biomedicine
关键词[WOS]	WORD FORM AREA ; POSTERIOR FUSIFORM ; VISUAL-CORTEX ; WRITTEN WORDS ; ACTIVATION ; FMRI ; PERCEPTION ; SPECIALIZATION ; PSEUDOWORDS ; COGNITION
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:000274371700033
引用统计	被引频次：17[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/173211/3959
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.Univ Calif San Diego, San Diego, CA 92103 USA 2.Univ Toronto, Toronto, ON M5S 1A1, Canada 3.Northwestern Univ, Evanston, IL 60208 USA 4.Chinese Acad Sci, Inst Automat, Beijing 100190, Peoples R China 5.Xidian Univ, Life Sci Res Ctr, Xian 710071, Shaanxi, Peoples R China 6.Beijing Jiaotong Univ, Sch Comp & Informat Technol, Dept Biomed Engn, Beijing 100044, Peoples R China
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,Zhang, Hongchuan,et al. Neural correlates of top-down letter processing[J]. NEUROPSYCHOLOGIA,2010,48(2):636-641.
APA	Liu, Jiangang.,Li, Jun.,Zhang, Hongchuan.,Rieth, Cory A..,Huber, David E..,...&Tian, Jie.(2010).Neural correlates of top-down letter processing.NEUROPSYCHOLOGIA,48(2),636-641.
MLA	Liu, Jiangang,et al."Neural correlates of top-down letter processing".NEUROPSYCHOLOGIA 48.2(2010):636-641.

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