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首页> 外文期刊>The European Journal of Neuroscience >Spatial discrimination of visually similar environments by hippocampal place cells in the presence of remote recalibrating landmarks.
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Spatial discrimination of visually similar environments by hippocampal place cells in the presence of remote recalibrating landmarks.

机译：在远程重新标定地标的情况下，海马放置细胞对视觉相似环境的空间区分。

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摘要

Place cells in the rat hippocampus commonly show place-related firing activity in the animal's current environment. Here, we evaluated the capability of the place cell system to discriminate visually identical environments. Place cell activity was first recorded while rats moved freely in a cylinder divided into three connected sectors. Two sectors were visually identical whereas the third sector was made distinctive by the addition of visual and tactile cues. When in a given sector, the rats could not perceive the cues present in the other two sectors. Most cells had distinctive place fields in each sector, including the two identical sectors. To rule out the influence of non-controlled cues, rotations of the cylinder (+/- 120 degrees) were conducted. When successful, cylinder rotations resulted in equivalent field rotation for all cells. These results suggest that the place cell system is able to form a specific spatial representation for all sectors, so that the rat knows, at any time, in which sector it is currently located. Presumably, such discrimination relies on angular path integration in which the computational errors stemming from self-motion cues would be corrected by environmental landmarks provided by the distinctive sector.
机译：大鼠海马中的位置细胞通常在动物当前的环境中表现出与位置相关的射击活动。在这里，我们评估了位置单元系统区分视觉上相同的环境的能力。当大鼠在分成三个相连部分的圆柱体中自由移动时，首先记录了位置细胞的活性。两个部分在视觉上是相同的，而第三部分则通过添加视觉和触觉提示而变得与众不同。当处于给定的区域时，大鼠无法感知其他两个区域中存在的线索。大多数单元在每个扇区中都有独特的放置字段，包括两个相同的扇区。为了排除不受控制的提示的影响，进行了圆柱旋转（+/- 120度）。成功完成后，圆柱旋转会导致所有单元的等效场旋转。这些结果表明，位置细胞系统能够对所有扇区形成特定的空间表示，以便大鼠在任何时候都知道它当前位于哪个扇区。据推测，这种区分依赖于角路径积分，其中由自运动线索产生的计算误差将由独特部门提供的环境标志来校正。

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