Similar spatial patterns of neural coding of category selectivity in FFA and VWFA under different attention conditions

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	Similar spatial patterns of neural coding of category selectivity in FFA and VWFA under different attention conditions
	Xu, Guifang1,2 ; Jiang, Yi3,4 ; Ma, Lifei 1,2; Yang, Zhi1,4 ; Weng, Xuchu1,5
刊名	NEUROPSYCHOLOGIA
	2012-04-01
卷号	50 期号:5 页码:862-868
关键词	fMRI Fusiform face area Visual word form area Multi-voxel pattern analysis (MVPA) Contrast-to-noise ratio
ISSN号	0028-3932
通讯作者	Yang, Z (reprint author), 4A Datun Rd, Beijing 100101, Peoples R China.
产权排序	1,4
英文摘要	It has long been debated whether attention alters the categorical selectivity in regions such as the fusiform face area (FFA) and the visual word form area (VWFA). We addressed this issue by examining whether the spatial pattern of neural representations for certain stimulus categories in these regions would change under different attention conditions. Faces. Chinese characters, and textures were presented in a block design fMRI experiment where participants in different runs attended to the stimuli under different conditions of attention. After localizing regions of interest (ROIs) in FFA and VWFA using general linear models, we performed spatial pattern analyses to examine both within- and cross-condition classification in these ROIs. The within-condition results replicated previous findings showing significant classification accuracy reduction when there was less attention compared with more attention. Critically, cross-condition classification in both FFA and VWFA revealed significantly above-chance accuracy for all stimulus categories, suggesting similar spatial neural representations across different attention conditions. Further strengthening this conclusion, when the contrast-to-noise ratio (CNR) of the signals was adjusted to increase signal strength, cross-condition classification accuracy for faces in FFA and for Chinese characters in VWFA improved significantly, even approaching within-condition accuracy. This indicates that attention does not modulate the spatial pattern of neural representations involved in category selectivity, but only changes the signal strength relative to the noise level. (C) 2012 Elsevier Ltd. All rights reserved.
学科主题	Cognitive neuroscience
收录类别	SCI ; SSCI
项目简介	We thank Sheng He, George Northoff, Wen Zhou, and John X. Zhang for valuable comments on the manuscript. This study was supported by NSFC (30900366 to ZY; 31070905 to XW; 31070903 to YJ) and Youth fund of IPCAS (O9CX012001 to ZY).
原文出处	http://ac.els-cdn.com/S0028393212000528/1-s2.0-S0028393212000528-main.pdf?_tid=76059034-d446-11e4-b800-00000aab0f6b&acdnat=1427436162_c9eb48a2f3255d08d1cbe7ddf9252287
语种	英语
WOS记录号	WOS:000303954900033
内容类型	期刊论文
源URL	[http://ir.psych.ac.cn/handle/311026/13262]
专题	心理研究所_中国科学院行为科学重点实验室
作者单位	1.Chinese Acad Sci, Inst Psychol, Key Lab Behav Sci, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China 3.Chinese Acad Sci, Inst Psychol, Key Lab Mental Hlth, Beijing 100101, Peoples R China 4.Chinese Acad Sci, Inst Psychol, Magnet Resonance Imaging Res Ctr, Beijing 100101, Peoples R China 5.Hangzhou Normal Univ, Ctr Cognit & Brain Disorders, Hangzhou 310003, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Xu, Guifang,Jiang, Yi,Ma, Lifei,et al. Similar spatial patterns of neural coding of category selectivity in FFA and VWFA under different attention conditions[J]. NEUROPSYCHOLOGIA,2012,50(5):862-868.
APA	Xu, Guifang,Jiang, Yi,Ma, Lifei,Yang, Zhi,&Weng, Xuchu.(2012).Similar spatial patterns of neural coding of category selectivity in FFA and VWFA under different attention conditions.NEUROPSYCHOLOGIA,50(5),862-868.
MLA	Xu, Guifang,et al."Similar spatial patterns of neural coding of category selectivity in FFA and VWFA under different attention conditions".NEUROPSYCHOLOGIA 50.5(2012):862-868.