What grid cells convey about rat location
What grid cells convey about rat location
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DOI：
10.1523/jneurosci.5684-07.2008
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发表时间：
2008-07-02
影响因子：
5.3
通讯作者：
Brookings, Ted
中科院分区：
文献类型：
--
作者：
Fiete, Ila R.;Burak, Yoram;Brookings, Ted
我们的特点之间的关系，同时记录的啮齿动物的网格细胞放电量和大鼠的位置。形式化揭示了网格细胞活动的各种属性时，被认为是一个神经代码表示和更新大鼠的位置估计。我们发现，虽然空间周期性的响应网格细胞出现浪费，代码是完全组合的能力。明确的位置表示所得到的范围是远远大于近似1-10米的周期的个别格子，允许独特的高分辨率的位置规格的行为觅食范围内的大鼠，与过剩的容量，可用于纠错。接下来，我们表明，位置表示的网格单元代码的优点远远超出容量，包括算术属性，便于位置更新。我们的结论是考虑到众多的影响，下游的读数和实验测试，网格单元代码的属性。
We characterize the relationship between the simultaneously recorded quantities of rodent grid cell firing and the position of the rat. The formalization reveals various properties of grid cell activity when considered as a neural code for representing and updating estimates of the rat's location. We show that, although the spatially periodic response of grid cells appears wasteful, the code is fully combinatorial in capacity. The resulting range for unambiguous position representation is vastly greater than the approximate to 1-10 m periods of individual lattices, allowing for unique high-resolution position specification over the behavioral foraging ranges of rats, with excess capacity that could be used for error correction. Next, we show that the merits of the grid cell code for position representation extend well beyond capacity and include arithmetic properties that facilitate position updating. We conclude by considering the numerous implications, for downstream readouts and experimental tests, of the properties of the grid cell code.