Representation of non-spatial and spatial information in the lateral entorhinal cortex.

Representation of non-spatial and spatial information in the lateral entorhinal cortex.
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DOI:
10.3389/fnbeh.2011.00069
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发表时间:
2011
影响因子:
3
通讯作者:
Knierim JJ
Knierim JJ
中科院分区:
医学3区
文献类型:
--
作者:
Deshmukh SS;Knierim JJ

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一些记忆理论认为,海马体将个体体验的项目和事件整合在一个背景或空间框架内。海马体从两条主要通路接受皮质输入:内侧内嗅皮层(MEC)和外侧内嗅皮层(LEC)。在开阔场地的探测过程中,MEC格子单元的射野形成周期性重复的三角形阵列。相反,LEC神经元表现出很小的空间选择性,有人认为LEC可能为海马区提供非空间输入。在这里,我们记录了MEC和LEC神经元,而大鼠探索了包含离散物体的开阔领域。LEC细胞在相对于物体的位置选择性地放电,而MEC细胞受物体的影响较弱。这些结果首次直接证明了在通常用于研究海马区细胞的探索条件下,LEC和MEC输入到海马区之间存在双重分离。
Some theories of memory propose that the hippocampus integrates the individual items and events of experience within a contextual or spatial framework. The hippocampus receives cortical input from two major pathways: the medial entorhinal cortex (MEC) and the lateral entorhinal cortex (LEC). During exploration in an open field, the firing fields of MEC grid cells form a periodically repeating, triangular array. In contrast, LEC neurons show little spatial selectivity, and it has been proposed that the LEC may provide non-spatial input to the hippocampus. Here, we recorded MEC and LEC neurons while rats explored an open field that contained discrete objects. LEC cells fired selectively at locations relative to the objects, whereas MEC cells were weakly influenced by the objects. These results provide the first direct demonstration of a double dissociation between LEC and MEC inputs to the hippocampus under conditions of exploration typically used to study hippocampal place cells.
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