Object and object-memory representations across the proximodistal axis of CA1

Object and object-memory representations across the proximodistal axis of CA1
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CA1 近远轴上的对象和对象记忆表示

DOI:
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发表时间:
2020
期刊:
bioRxiv
影响因子:
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通讯作者:
J. Ainge
J. Ainge
中科院分区:
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文献类型:
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作者:
Brianna Vandrey;J. Ainge

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情景记忆需要将有关对象的信息整合到空间框架中。海马体中的位置细胞编码物体的空间表征,这些空间表征可以通过来自内嗅皮层的信号产生。从外侧和内侧内嗅皮质到海马的投射分别终止于远端和近端CA 1。我们记录的位置细胞在远端和近端CA 1大鼠探索的环境中,包含的对象。远端CA 1的位置细胞表现出更高的空间调谐措施,并表示更接近物体的位置场。此外,重新映射到对象位移调制放置场接近对象的远端,但不是近端CA 1。最后,表示以前的对象位置更精确的远端CA 1。我们的数据表明,外侧内嗅皮层输入海马支持空间表征,更精确和响应对象的线索丰富的环境。这与物体位置记忆的内鼻-海马回路中的功能分离是一致的。
Episodic memory requires information about objects to be integrated into a spatial framework. Place cells in the hippocampus encode spatial representations of objects that could be generated through signalling from the entorhinal cortex. Projections from lateral and medial entorhinal cortex to the hippocampus terminate in distal and proximal CA1, respectively. We recorded place cells in distal and proximal CA1 as rats explored an environment that contained objects. Place cells in distal CA1 demonstrated higher measures of spatial tuning and expressed place fields closer to objects. Further, remapping to object displacement was modulated by place field proximity to objects in distal, but not proximal CA1. Finally, representations of previous object locations were more precise in distal CA1. Our data suggest that lateral entorhinal cortex inputs to the hippocampus support spatial representations that are more precise and responsive to objects in cue-rich environments. This is consistent with functional segregation in the entorhinal-hippocampal circuits underlying object-place memory.
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