New and distinct hippocampal place codes are generated in a new environment during septal inactivation.

New and distinct hippocampal place codes are generated in a new environment during septal inactivation.
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DOI:
10.1016/j.neuron.2014.04.013
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发表时间:
2014-05-21
期刊:
影响因子:
16.2
通讯作者:
Leutgeb S
Leutgeb S
中科院分区:
医学1区
文献类型:
--
作者:
Brandon MP;Koenig J;Leutgeb JK;Leutgeb S

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海马体产生不同的神经代码来消除类似经历的歧义,这一过程被认为是情景记忆功能的基础。内嗅网格细胞提供了一个突出的空间信号,海马,其放电模式的变化,从而产生不同的空间代码在每一个上下文。我们研究了我们是否会排除出现新的空间表示在一个新的环境中muscimol失活的内侧隔区,操纵已知的破坏θ振荡和网格细胞放电。我们发现,新的,高度不同的配置的位置字段立即出现,并保持稳定,在隔失活。当θ振荡恢复时,新的位置代码仍然存在。因此,在海马体中产生新的空间表征并不需要来自网格细胞网络的θ节律性和前馈输入。
The hippocampus generates distinct neural codes to disambiguate similar experiences, a process thought to underlie episodic memory function. Entorhinal grid cells provide a prominent spatial signal to hippocampus, and changes in their firing pattern could thus generate a distinct spatial code in each context. We examined whether we would preclude the emergence of new spatial representations in a novel environment during muscimol inactivation of the medial septal area, a manipulation known to disrupt theta oscillations and grid cell firing. We found that new, highly distinct configurations of place fields emerged immediately and remained stable during the septal inactivation. The new place code persisted when theta oscillations had recovered. Theta rhythmicity and feedforward input from grid cell networks were thus not required to generate new spatial representations in the hippocampus.
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发表时间: 2013-03-01
影响因子: 25
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