Differential role of the dorsal hippocampus, ventro-intermediate hippocampus, and medial prefrontal cortex in updating the value of a spatial goal

被引:15
作者
Blanquat, Paul De Saint [1 ]
Hok, Vincent [1 ]
Save, Etienne [1 ]
Poucet, Bruno [1 ]
Chaillan, Franck A. [1 ]
机构
[1] Aix Marseille Univ, CNRS, Neural Basis Spatial Cognit Team, Lab Cognit Neurosci,Federat FR 3512 3C, Marseille, France
关键词
muscimol; continuous place navigation task; temporary inactivation; rat; DECISION-MAKING; FRONTAL-CORTEX; IMMEDIATE EXTINCTION; MIDLINE THALAMUS; RAT; PROJECTIONS; NAVIGATION; MEMORY; AREA; FEAR;
D O I
10.1002/hipo.22094
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Encoding of a goal with a specific value while performing a place navigation task involves the medial prefrontal cortex (mPFC) and the dorsal hippocampus (dHPC), and depends on the coordination between mPFC and the ventro-intermediate hippocampus (vHPC).The present work investigates the contribution of mPFC, dHPC, and vHPC when the rat has to update the value of a goal. Rats were trained to navigate to an uncued goal in order to release a food pellet in a continuous place navigation task. When they had reached criterion performance level in the task, they were subjected to a single flash session in which they were exposed to an aversive strobe light during goal visits instead of receiving a food reward. Just before the flash session, the GABAA agonist muscimol was injected to temporarily inactivate mPFC, dHPC, or vHPC. The ability to recall the changed value of the goal was tested on the next day. We first demonstrate the aversive effect of the strobe light by showing that rats learn to avoid the goal much more rapidly in the flash session than during a simple extinction session in which goal visits are not rewarded. Furthermore, while dHPC inactivation had no effect on learning and recalling the new goal value, vHPC muscimol injections considerably delayed goal value updating during the flash session, which resulted in a slight deficit during recall. In contrast, mPFC muscimol injections induced faster goal value updating but the rats were markedly impaired on recalling the new goal value on the next day. These results suggest that, contrary to mPFC and dHPC, vHPC is required for updating the value of a goal. In contrast, mPFC is necessary for long-term retention of this updating. (c) 2013 Wiley Periodicals, Inc.
引用
收藏
页码:342 / 351
页数:10
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