Context-enabled learning in the human visual system
Context-enabled learning in the human visual system
复制标题
DOI：
10.1038/415790a
复制
发表时间：
2002-02-14
期刊：
影响因子：
64.8
通讯作者：
Tsodyks, M
中科院分区：
文献类型：
--
作者：
Adini, Y;Sagi, D;Tsodyks, M
研究发现，训练可以提高人类在各种视觉感知任务上的表现（1,2）。然而，检测简单视觉刺激对比度的微小变化的能力不能通过重复来提高(3)。在这里，我们表明，在存在类似的横向放置的刺激的情况下，刺激对比的区分可以改变这个基本任务的表现，这表明参与任务的局部神经元回路发生了变化。在hebbian和anti-hebbian突触学习规则与我们的结果相一致的基础上，我们提出了一种视觉皮层可塑性的机制，这种机制是由环境的变化所激活的。
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.