The goals of the present study were to determine if ibotenic acid lesions of the dorsal hippocampus (dHPC) or of mammillary body (MB) of the hypothalamus would induce similar contextual conditioning deficit in a fear-conditioning paradigm, previously developed in mice [Eur. J. Neurosci. 12 (2000) 2575]. Results showed that ibotenic acid lesions of the dHPC or of the MB both induced severe deficits on contextual conditioning but spared auditory conditioning, as compared to controls. This study provides direct evidence for an involvement of dHPC neurones in contextual fear conditioning and is first to demonstrate an involvement of the MB in the mediation of contextual fear conditioning. (C) 2003 Elsevier B.V. All rights reserved.
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Dept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks RoadDept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks Road
Bannerman D.M.
Yee B.K.
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Dept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks RoadDept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks Road
Yee B.K.
Lemaire M.
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Dept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks RoadDept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks Road
Lemaire M.
Jarrard L.
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Dept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks RoadDept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks Road
Jarrard L.
Iversen S.D.
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Dept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks RoadDept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks Road
Iversen S.D.
Rawlins J.N.P.
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Dept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks RoadDept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks Road
Rawlins J.N.P.
Good M.A.
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Dept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks RoadDept. of Experimental Psychology, University of Oxford, Oxford OX1 3UD, South Parks Road