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Sparse Coding Can Predict Primary Visual Cortex Receptive Field Changes Induced by Abnormal Visual Input

机译:稀疏编码可以预测视觉输入异常引起的主要视觉皮层感受野变化

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摘要

Receptive fields acquired through unsupervised learning of sparse representations of natural scenes have similar properties to primary visual cortex (V1) simple cell receptive fields. However, what drives in vivo development of receptive fields remains controversial. The strongest evidence for the importance of sensory experience in visual development comes from receptive field changes in animals reared with abnormal visual input. However, most sparse coding accounts have considered only normal visual input and the development of monocular receptive fields. Here, we applied three sparse coding models to binocular receptive field development across six abnormal rearing conditions. In every condition, the changes in receptive field properties previously observed experimentally were matched to a similar and highly faithful degree by all the models, suggesting that early sensory development can indeed be understood in terms of an impetus towards sparsity. As previously predicted in the literature, we found that asymmetries in inter-ocular correlation across orientations lead to orientation-specific binocular receptive fields. Finally we used our models to design a novel stimulus that, if present during rearing, is predicted by the sparsity principle to lead robustly to radically abnormal receptive fields.
机译:通过对自然场景的稀疏表示进行无监督学习而获得的感受野具有与主要视觉皮层(V1)简单细胞感受野相似的特性。然而,什么驱动受体领域的体内发展仍然是有争议的。视觉体验中感觉体验重要性的最有力证据来自饲养异常视觉输入的动物的感受野变化。但是,大多数稀疏编码帐户仅考虑了正常的视觉输入和单眼感受野的发展。在这里,我们将三种稀疏编码模型应用于跨越六个异常饲养条件的双眼感受野的发育。在每种情况下,以前通过实验观察到的感受野特性的变化在所有模型中都达到了相似且高度忠实的程度,这表明早期感觉发展的确可以理解为稀疏性的推动力。正如先前在文献中所预测的,我们发现跨方向的眼间相关性中的不对称会导致特定于方向的双眼感受野。最后,我们使用我们的模型设计了一种新颖的刺激,如果在饲养过程中存在刺激,则稀疏原理可以预测该刺激强烈导致根本异常的感受野。

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