WHERE PRACTICE MAKES PERFECT IN TEXTURE-DISCRIMINATION - EVIDENCE FOR PRIMARY VISUAL-CORTEX PLASTICITY
WHERE PRACTICE MAKES PERFECT IN TEXTURE-DISCRIMINATION - EVIDENCE FOR PRIMARY VISUAL-CORTEX PLASTICITY
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DOI：
10.1073/pnas.88.11.4966
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发表时间：
1991-06-01
影响因子：
11.1
通讯作者：
SAGI, D
中科院分区：
文献类型：
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作者：
KARNI, A;SAGI, D
从功能解剖学的角度来看，当一个基本的视觉辨别任务的表现随着练习而提高（知觉学习）时，学习发生在哪里？我们报告了在一个简单的纹理辨别任务中显著的长期学习，其中学习是针对视网膜输入的。这种学习是(i)局部的（在视网膜定位意义上），（ii）定向特异性但不对称的（它对背景特异性但不针对目标元素的定向），以及（iii）强烈的单眼性（很少有眼间学习迁移）。我们的研究结果表明，在视觉系统的一个层面上，学习涉及经验依赖的变化，在这个层面上，视觉输入的单眼和视网膜组织仍然被保留，不同的方向被单独处理。这些结果可以解释为视网膜输入在成人早期视觉加工中诱导的局部可塑性，可能是在初级视觉皮层的定向梯度敏感细胞水平上。
In terms of functional anatomy, where does learning occur when, for a basic visual discrimination task, performance improves with practice (perceptual learning)? We report remarkable long-term learning in a simple texture discrimination task where learning is specific for retinal input. This learning is (i) local (in a retinotopic sense), (ii) orientation specific but asymmetric (it is specific for background but not for target-element orientation), and (iii) strongly monocular (there is little interocular transfer of learning). Our results suggest that learning involves experience-dependent changes at a level of the visual system where monocularity and the retinotopic organization of the visual input are still retained and where different orientations are processed separately. These results can be interpreted in terms of local plasticity induced by retinal input in early visual processing in human adults, presumably at the level of orientation-gradient sensitive cells in primary visual cortex.