Sharpened cortical tuning and enhanced cortico-cortical communication contribute to the long-term neural mechanisms of visual motion perceptual learning

doi:10.1016/j.neuroimage.2015.04.041

CORC > 北京大学 > 生命科学学院

	Sharpened cortical tuning and enhanced cortico-cortical communication contribute to the long-term neural mechanisms of visual motion perceptual learning
	Chen Nihong ; Bi Taiyong ; Zhou Tiangang ; Li Sheng ; Liu Zili ; Fang Fang
刊名	神经影像
	2015
关键词	Dynamic causal modeling,Functional magnetic resonance imaging,Multivariate analysis,Perceptual learning,Visual cortex
DOI	10.1016/j.neuroimage.2015.04.041
英文摘要	Much has been debated about whether the neural plasticity mediating perceptual learning takes place at the sensory or decision-making stage in the brain. To investigate this, we trained human subjects in a visual motion direction discrimination task. Behavioral performance and BOLD signals were measured before, immediately after, and two weeks after training. Parallel to subjects' long-lasting behavioral improvement, the neural selectivity in V3A and the effective connectivity from V3A to IPS (intraparietal sulcus, a motion decision-making area) exhibited a persistent increase for the trained direction. Moreover, the improvement was well explained by a linear combination of the selectivity and connectivity increases. These findings suggest that the long-term neural mechanisms of motion perceptual learning are implemented by sharpening cortical tuning to trained stimuli at the sensory processing stage, as well as by optimizing the connections between sensory and decision-making areas in the brain.Copyright ? 2015 Elsevier Inc. All rights reserved.; SCI(E); PubMed; 0; ARTICLE; zili@psych.ucla.edu; ffang@pku.edu.cn; 17-29; 115
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/188005]
专题	生命科学学院心理与认知科学学院
推荐引用方式 GB/T 7714	Chen Nihong,Bi Taiyong,Zhou Tiangang,et al. Sharpened cortical tuning and enhanced cortico-cortical communication contribute to the long-term neural mechanisms of visual motion perceptual learning[J]. 神经影像,2015.
APA	Chen Nihong,Bi Taiyong,Zhou Tiangang,Li Sheng,Liu Zili,&Fang Fang.(2015).Sharpened cortical tuning and enhanced cortico-cortical communication contribute to the long-term neural mechanisms of visual motion perceptual learning.神经影像.
MLA	Chen Nihong,et al."Sharpened cortical tuning and enhanced cortico-cortical communication contribute to the long-term neural mechanisms of visual motion perceptual learning".神经影像 (2015).