Consolidation of cellular memory representations in superficial neocortex.

Consolidation of cellular memory representations in superficial neocortex.
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DOI:
10.1016/j.isci.2023.105970
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发表时间:
2023-02-17
期刊:
影响因子:
5.8
通讯作者:
McNaughton, Bruce L.
McNaughton, Bruce L.
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Esteves, Ingrid M.;Chang, HaoRan;Neumann, Adam R.;McNaughton, Bruce L.

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Systems-level memory consolidation, a key concept in memory research, involves the conversion of memories that depend on the hippocampus for their formation into efficient hippocampus-independent forms, presumably encoded by cortico-cortical connections. Yet, little is understood about the nature of consolidated neural codes at the cellular ensemble level. Mice require an intact hippocampus for “virtual” spatial learning and to develop neocortical representations of the corresponding experiences. We find that, whereas a novel virtual environment is neither learned nor represented in superficial cortex following severe damage to hippocampus, pre-operatively learned memories and their corresponding sparse and widespread neural ensemble representations in cortical layers II–III are preserved, a sine qua non of memory consolidation. These findings provide a new window for future study of the cellular mechanisms of memory consolidation. Two-photon imaging of position-correlated cortical cells in VR spatial navigation Place encoding is rescued for familiar but not novel environment following HPC lesion Preemptive licking at reward site demonstrates anterograde but not retrograde amnesia Functional demonstration of the consolidation of hippocampal-dependent memory traces Behavioral neuroscience; Cellular neuroscience; Cell biology
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