A hippocampal network for spatial coding during immobility and sleep.

A hippocampal network for spatial coding during immobility and sleep.
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DOI:
10.1038/nature17144
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发表时间:
2016-03-10
期刊:
影响因子:
64.8
通讯作者:
Frank, Loren M.
Frank, Loren M.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Kay, Kenneth;Sosa, Marielena;Chung, Jason E.;Karlsson, Mattias P.;Larkin, Margaret C.;Frank, Loren M.

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How does an animal know where it is when it stops moving? Hippocampal place cells fire at discrete locations as subjects traverse space, thereby providing an explicit neural code for current location during locomotion. In contrast, during awake immobility, the hippocampus is thought to be dominated by neural firing representing past and possible future experience. The question of whether and how the hippocampus constructs a representation of current location in the absence of locomotion has stood unresolved. Here we report that a distinct population of hippocampal neurons, located in the CA2 subregion, signals current location during immobility, and furthermore does so in association with a previously unidentified hippocampus-wide network pattern. In addition, signaling of location persists into brief periods of desynchronization prevalent in slow-wave sleep. The hippocampus thus generates a distinct representation of current location during immobility, pointing to mnemonic processing specific to experience occurring in the absence of locomotion.
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