Task-dependent uncertainty modulation of perceptual decisions in the   human brain

doi:10.1111/ejn.12006

CORC > 北京大学 > 心理与认知科学学院

	Task-dependent uncertainty modulation of perceptual decisions in the human brain
	Li, Sheng ; Yang, Feitong
刊名	european journal of neuroscience
	2012
关键词	categorization fMRI perception task difficulty vision LATERAL OCCIPITAL COMPLEX HUMAN VISUAL-CORTEX PREFRONTAL CORTEX NEURAL BASIS LEARNING SHAPES PARIETAL CORTEX CATEGORICAL DECISIONS RESPONSE MODALITY COGNITIVE CONTROL SEMANTIC MEMORY
DOI	10.1111/ejn.12006
英文摘要	Perceptual judgments are frequently made during uncertain situations. Previous human brain imaging studies have revealed multiple cortical and subcortical areas that are activated when decision uncertainty is linked to outcome probability. However, the neural mechanisms of uncertainty modulation in different perceptual decision tasks have not been systematically investigated. Uncertainty of perceptual decision can originate either from highly similar object categories (e.g. tasks based on criterion comparison) or from noise being added to visual stimuli (e.g. tasks based on signal detection). In this study, we used functional magnetic resonance imaging (fMRI) to investigate the neural mechanisms of task-dependent modulation of uncertainty in the human brain during perceptual judgements. We observed correlations between uncertainty levels and fMRI activity in a network of areas responsible for performance monitoring and sensory evidence comparison in both tasks. These areas are associated with late stages of perceptual decision, and include the posterior medial frontal cortex, dorsal lateral prefrontal cortex, and intraparietal sulcus. When the modulation of uncertainty on the two tasks was compared, dissociable cortical networks were identified. Uncertainty in the criterion comparison task modulated activity in the left lateral prefrontal cortex related to rule retrieval. In the signal detection task, uncertainty modulated activity in higher visual processing areas thought to be sensory information accumulators that are active during early stages of perceptual decision. These findings offer insights into the mechanism of information processing during perceptual decision-making.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000312548200013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Neurosciences; SCI(E); PubMed; 3; ARTICLE; 12; 3732-3739; 36
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/162794]
专题	心理与认知科学学院
推荐引用方式 GB/T 7714	Li, Sheng,Yang, Feitong. Task-dependent uncertainty modulation of perceptual decisions in the human brain[J]. european journal of neuroscience,2012.
APA	Li, Sheng,&Yang, Feitong.(2012).Task-dependent uncertainty modulation of perceptual decisions in the human brain.european journal of neuroscience.
MLA	Li, Sheng,et al."Task-dependent uncertainty modulation of perceptual decisions in the human brain".european journal of neuroscience (2012).