Neural correlates of short-term perceptual learning in orientation discrimination indexed by event-related potentials

作     者：SONG Yan PENG DanLing LI XiaoLan ZHANG Yi KANG Jing QU Zhe DING YuLong 

作者机构：State Key Laboratory of Cognitive Neuroscience and Leaming Beijing Normal University Beijing 100875 China Department of Psychology Sun Yat-Sen University Guangzhou 510275 China 

出 版 物：《Chinese Science Bulletin》 (Chin. Sci. Bull.)

年 卷 期：2007年第52卷第3期

页      面：352-357页

核心收录：

学科分类：1001[医学-基础医学(可授医学、理学学位)] 10[医学] 

基　　金：the National Natural Science Foundation of China (Grant Nos. 30600180, 30400133 and 30570605) the Beijing Natural Science Foundation (Grant No. 7073092) 

主　　题：知觉学习 视觉 短期学习 方向辨别 神经机制 事件相关电位 成年人 

摘      要：The current work investigated the neural correlates of visual perceptual learning in grating orientation discrimination by recording event-related potentials (ERPs) from human adults. Subjects were trained with a discrimination task of grating orientation in three consecutive training sessions within 2 h. While reaction times (RTs) were shortened gradually across training sessions, the N1 was decreased and the P2 was increased over the parietal and occipital areas. A broadly distributed P3 was increased along with more practices. In addition, the time course of learning reflected in the P2 and P3 amplitudes was in line with the changes of reaction times and exhibited a stable level during later training. The impli- cations of these results to the neural mechanisms subserving perceptual learning were discussed.