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Novel sensory preconditioning procedures identify a specific role for the hippocampus in pattern completion

Lin, Tzu-Ching E., Dumigan, Natasha M., Good, Mark and Honey, Robert Colin 2016. Novel sensory preconditioning procedures identify a specific role for the hippocampus in pattern completion. Neurobiology of Learning and Memory 130 , pp. 142-148. 10.1016/j.nlm.2016.02.006

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Abstract

Successful retrieval of a memory for an entire pattern of stimulation by the presentation of a fragment of that pattern is a critical facet of memory function. We examined processes of pattern completion using novel sensory preconditioning procedures in rats that had either received sham lesions (group Sham) or lesions of the hippocampus (group HPC). After exposure to two audio-visual patterns (AX and BY) rats received fear conditioning with X (but not Y). Subsequent tests assessed fear to stimulus compounds (e.g., AX versus BX; Experiment 1) or elements (A versus B; Experiment 2). There was more fear to AX than BX in group Sham but not group HPC, while there was more fear to A than B in group HPC, but not in group Sham. This double dissociation suggests that pattern completion can be based upon separable processes that differ in their reliance on the hippocampus.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Subjects: R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Publisher: Elsevier
ISSN: 1074-7427
Funders: Biotechnology and Biological Sciences Research Council
Last Modified: 04 Jun 2017 08:53
URI: http://orca.cf.ac.uk/id/eprint/87029

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