论文标题
网格细胞渗透
Grid Cell Percolation
论文作者
论文摘要
网格细胞在使环境环境的哺乳动物认知表示方面起着主要作用。这些单元格的关键特性（其射击场的常规排列）通常被视为建立空间尺度或编码特定位置的手段。但是，由于动物对网格场的零星访问触发的相当不规则的激活模式，使用网格单元的尖峰输出来推论空间秩序被证明是一项艰巨的任务。以下讨论涉及从渗透理论的角度来看，使网格细胞发射活性的紧急规律性的统计机制。特别是，这表明，峰值渗透现象所需的神经生理参数范围与实验数据相匹配，该数据指出了渗透方法的生物生存力，并为网格细胞在组织海马图中的作用提供了新的启示。
Grid cells play a principal role in enabling mammalian cognitive representations of ambient environments. The key property of these cells -- the regular arrangement of their firing fields -- is commonly viewed as means for establishing spatial scales or encoding specific locations. However, using grid cells' spiking outputs for deducing spatial orderliness proves to be a strenuous task, due to fairly irregular activation patterns triggered by the animal's sporadic visits to the grid fields. The following discussion addresses statistical mechanisms enabling emergent regularity of grid cell firing activity, from the perspective of percolation theory. In particular, it is shown that the range of neurophysiological parameters required for spiking percolation phenomena matches experimental data, which points at biological viability of the percolation approach and casts a new light on the role of grid cells in organizing the hippocampal map.
