Functional organization of the medial temporal lobe memory system following neonatal hippocampal lesion in rhesus monkeys

被引:7
|
作者
Chareyron, Loic J. [1 ]
Lavenex, Pamela Banta [2 ]
Amaral, David G. [3 ]
Lavenex, Pierre [1 ,2 ]
机构
[1] Univ Fribourg, Dept Med, Lab Brain & Cognit Dev, Fribourg, Switzerland
[2] Univ Lausanne, Inst Psychol, Lab Brain & Cognit Dev, Lausanne, Switzerland
[3] Univ Calif Davis, Calif Natl Primate Res Ctr, MIND Inst, Dept Psychiat & Behav Sci,Ctr Neurosci, Davis, CA USA
来源
BRAIN STRUCTURE & FUNCTION | 2017年 / 222卷 / 09期
基金
美国国家卫生研究院; 瑞士国家科学基金会;
关键词
Hippocampus; Entorhinal; Perirhinal; Parahippocampal; Cingulate; Retrosplenial; ALLOCENTRIC SPATIAL MEMORY; MACAQUE MONKEY; ENTORHINAL CORTEX; PARAHIPPOCAMPAL CORTICES; RETROSPLENIAL CORTEX; PERIRHINAL CORTEX; CYTOARCHITECTONIC ORGANIZATION; COGNITIVE NEUROSCIENCE; RECOGNITION MEMORY; AMYGDALA LESIONS;
D O I
10.1007/s00429-017-1441-z
中图分类号
R602 [外科病理学、解剖学]; R32 [人体形态学];
学科分类号
100101 ;
摘要
Hippocampal damage in adult humans impairs episodic and semantic memory, whereas hippocampal damage early in life impairs episodic memory but leaves semantic learning relatively preserved. We have previously shown a similar behavioral dissociation in nonhuman primates. Hippocampal lesion in adult monkeys prevents allocentric spatial relational learning, whereas spatial learning persists following neonatal lesion. Here, we quantified the number of cells expressing the immediate-early gene c-fos, a marker of neuronal activity, to characterize the functional organization of the medial temporal lobe memory system following neonatal hippocampal lesion. Ninety minutes before brain collection, three control and four adult monkeys with bilateral neonatal hippocampal lesions explored a novel environment to activate brain structures involved in spatial learning. Three other adult monkeys with neonatal hippocampal lesions remained in their housing quarters. In unlesioned monkeys, we found high levels of c-fos expression in the intermediate and caudal regions of the entorhinal cortex, and in the perirhinal, parahippocampal, and retrosplenial cortices. In lesioned monkeys, spatial exploration induced an increase in c-fos expression in the intermediate field of the entorhinal cortex, the perirhinal, parahippocampal, and retrosplenial cortices, but not in the caudal entorhinal cortex. These findings suggest that different regions of the medial temporal lobe memory system may require different types of interaction with the hippocampus in support of memory. The caudal perirhinal cortex, the parahippocampal cortex, and the retrosplenial cortex may contribute to spatial learning in the absence of functional hippocampal circuits, whereas the caudal entorhinal cortex may require hippocampal output to support spatial learning.
引用
收藏
页码:3899 / 3914
页数:16
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