Grid cells in the entorhinal cortex allow for the precise decoding of position in space. Along with potentially playing an important role in navigation, grid cells have recently been hypothesized to make a general contribution to mental operations. A prerequisite for this hypothesis is that grid cell activity does not critically depend on physical movement. Here, we show that movement of covert attention, without any physical movement, also elicits spatial receptive fields with a triangular tiling of space. In monkeys trained to maintain central fixation while covertly attending to a stimulus moving in the periphery we identified a significant population (20/141, 14% neurons at a FDR <5%) of entorhinal cells with spatially structured receptive fields. This contrasts with recordings obtained in the hippocampus, where grid-like representations were not observed. Our results provide evidence that neurons in macaque entorhinal cortex do not rely on physical movement.

中文翻译：

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内嗅皮层感受野受空间注意力的调节，即使没有运动

内嗅皮层中的网格细胞允许精确解码空间位置。除了可能在导航中发挥重要作用外，最近还假设网格单元对心理操作做出了普遍贡献。这个假设的先决条件是网格细胞活动并不严格依赖于物理运动。在这里，我们展示了在没有任何物理运动的情况下，隐蔽注意力的运动也会引发具有三角形空间平铺的空间感受野。在经过训练以保持中央固定的猴子中，我们发现了一个显着的群体（20/141，14% 的神经元，FDR <5%）具有空间结构的感受野的内嗅细胞。这与在海马体中获得的记录形成对比，其中未观察到网格状表示。我们的研究结果证明，猕猴内嗅皮层中的神经元不依赖于身体运动。