Learning Shapes Spatiotemporal Brain Patterns for Flexible Categorical   Decisions

doi:10.1093/cercor/bhr309

CORC > 北京大学 > 心理与认知科学学院

	Learning Shapes Spatiotemporal Brain Patterns for Flexible Categorical Decisions
	Li, Sheng ; Mayhew, Stephen D. ; Kourtzi, Zoe
刊名	cerebral cortex
	2012
关键词	brain imaging brain plasticity EEG fMRI visual categorization EVENT-RELATED POTENTIALS PRIMARY VISUAL-CORTEX INDEPENDENT COMPONENT ANALYSIS PERCEPTUAL DECISION NEURAL BASIS PREFRONTAL CORTEX TIME-COURSE OBJECT REPRESENTATIONS INFORMATION MEASURES PARIETAL CORTEX
DOI	10.1093/cercor/bhr309
英文摘要	Learning is thought to facilitate our ability to perform complex perceptual tasks and optimize brain circuits involved in decision making. However, little is known about the experience-dependent mechanisms in the human brain that support our ability to make fine categorical judgments. Previous work has focused on identifying spatial brain patterns (i.e., areas) that change with learning. Here, we take advantage of the complementary high spatial and temporal resolution of simultaneous electroencephalography-functional magnetic resonance imaging (EEG-fMRI) to identify the spatiotemporal dynamics between cortical networks involved in flexible category learning. Observers were trained to use different decision criteria (i.e., category boundaries) when making fine categorical judgments on morphed stimuli (i.e., radial vs. concentric patterns). Our findings demonstrate that learning acts on a feedback-based circuit that supports fine categorical judgments. Experience-dependent changes in the behavioral decision criterion were associated with changes in later perceptual processes engaging higher occipitotemporal and frontoparietal circuits. In contrast, category learning did not modulate early processes in a medial frontotemporal network that are thought to support the coarse interpretation of visual scenes. These findings provide evidence that learning flexible criteria for fine categorical judgments acts on distinct spatiotemporal brain circuits and shapes the readout of sensory signals that provide evidence for categorical decisions.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000308530500011&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Neurosciences; SCI(E); PubMed; 8; ARTICLE; 10; 2322-2335; 22
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/323401]
专题	心理与认知科学学院
推荐引用方式 GB/T 7714	Li, Sheng,Mayhew, Stephen D.,Kourtzi, Zoe. Learning Shapes Spatiotemporal Brain Patterns for Flexible Categorical Decisions[J]. cerebral cortex,2012.
APA	Li, Sheng,Mayhew, Stephen D.,&Kourtzi, Zoe.(2012).Learning Shapes Spatiotemporal Brain Patterns for Flexible Categorical Decisions.cerebral cortex.
MLA	Li, Sheng,et al."Learning Shapes Spatiotemporal Brain Patterns for Flexible Categorical Decisions".cerebral cortex (2012).