Context-enabled learning in the human visual system

被引:134
作者
Adini, Y [1 ]
Sagi, D [1 ]
Tsodyks, M [1 ]
机构
[1] Weizmann Inst Sci, Dept Neurobiol, IL-76100 Rehovot, Israel
基金
美国国家科学基金会;
关键词
D O I
10.1038/415790a
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Training was found to improve the performance of humans on a variety of visual perceptual tasks(1,2). However, the ability to detect small changes in the contrast of simple visual stimuli could not be improved by repetition(3). Here we show that the performance of this basic task could be modified after the discrimination of the stimulus contrast was practised in the presence of similar laterally placed stimuli, suggesting a change in the local neuronal circuit involved in the task. On the basis of a combination of hebbian and anti-hebbian synaptic learning rules compatible with our results, we propose a mechanism of plasticity in the visual cortex that is enabled by a change in the context.
引用
收藏
页码:790 / 793
页数:4
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