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arXiv 1408.3028q-bio.NC
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高精度解码来自大视网膜群体的动态运动

High accuracy decoding of dynamical motion from a large retinal population

Olivier Marre, Vicente Botella-Soler, Kristina D. Simmons, Thierry Mora, Gašper Tkačik, Michael J. Berry

摘要:

运动跟踪是视觉系统必须通过读出视网膜群体来解决的挑战。在这里,我们记录了大量的神经节细胞在蝾螈和豚鼠视网膜的密集补丁,同时显示一个酒吧扩散移动。我们表明,酒吧的位置可以重建从视网膜活动的精度在超敏度制度使用线性解码器作用于100+细胞。经典的观点认为,细胞的放电频率形成了一个移动的活动山,跟踪酒吧的位置。相反,我们发现神经节细胞在一个比它们的感受野预测的大得多的区域上稀疏地发射,所以神经图像没有跟踪酒吧。这种高度冗余的组织允许不同的神经节细胞集合以易于被下游神经回路读出的形式表示高精度的运动信息。

英文摘要:

Motion tracking is a challenge the visual system has to solve by reading out the retinal population. Here we recorded a large population of ganglion cells in a dense patch of salamander and guinea pig retinas while displaying a bar moving diffusively. We show that the bar position can be reconstructed from retinal activity with a precision in the hyperacuity regime using a linear decoder acting on 100+ cells. The classical view would have suggested that the firing rates of the cells form a moving hill of activity tracking the bar's position. Instead, we found that ganglion cells fired sparsely over an area much larger than predicted by their receptive fields, so that the neural image did not track the bar. This highly redundant organization allows for diverse collections of ganglion cells to represent high-accuracy motion information in a form easily read out by downstream neural circuits.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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