Hippocampal place codes are gated by behavioral engagement.

Hippocampal place codes are gated by behavioral engagement.
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DOI:
10.1038/s41593-022-01050-4
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发表时间:
2022-05
影响因子:
25
通讯作者:
Harvey, Christopher D.
Harvey, Christopher D.
中科院分区:
医学1区
文献类型:
--
作者:
Pettit, Noah L.;Yuan, Xintong C.;Harvey, Christopher D.

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当动物探索一个环境时,海马体被认为通过结合感觉和自我运动信号自动形成并维持一个位置代码。相反,我们观察到,当小鼠自愿脱离虚拟导航任务时,位置代码的广泛退化,即使它们继续穿越相同的环境也是如此。因此,即使没有感觉和自我运动的变化,内部状态也可以强烈地门控空间地图和重组海马活动。作者发现海马中空间映射的表达受到动物内部状态的调节。因此,即使外部世界没有变化,大脑对环境中空间位置的编码也会发生变化。
As animals explore an environment, the hippocampus is thought to automatically form and maintain a place code by combining sensory and self-motion signals. Instead, we observed an extensive degradation of the place code when mice voluntarily disengaged from a virtual navigation task, remarkably even as they continued to traverse the identical environment. Internal states, therefore, can strongly gate spatial maps and reorganize hippocampal activity even without sensory and self-motion changes. The authors found that the expression of spatial maps in the hippocampus is modulated by the internal state of an animal. Thus, the brain’s code for spatial positions within an environment can transform even without changes to the external world.
DOI: 10.1152/jn.1997.78.2.597
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