Farina, Francesca R. and Commins, Sean (2020) Hippocampal and prefrontal contributions to memory retrieval: Examination of immediate early gene, NMDA receptor and environmental interactions. European Journal of Neuroscience, 52. pp. 2982-2994. ISSN 1460-9568
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Abstract
Animals can use a range of strategies to recall important locations. These include
simple stimulus–response strategies and more complex spatial (place) strategies,
which are thought to have distinct neural substrates. The hippocampus—and NMDA
receptor activation therein—is considered to be crucial for spatial, but not response
strategies. The medial prefrontal cortex has also been implicated in memory retrieval;
however, evidence concerning its specific role is equivocal. Both hippocampal and
prefrontal regions have been associated with flexible behavioural responding (e.g.
when task demands change). Here, we investigated the use of spatial and non-spatial
strategies in the Morris water maze and their associated brain areas in rats using immediate early gene (IEG) imaging of Zif268 and c-Fos. Specifically, we charted the
involvement of hippocampal and prefrontal subregions during retrieval of spatial
and non-spatial memories. Behavioural flexibility was also examined using intact
and partial cue configurations during recall. Results indicated that regions of both
the hippocampus (area CA3) and prefrontal cortex (anterior cingulate cortex) were
preferentially engaged in spatial memory recall compared to response learning. In
addition, both spatial and non-spatial memories were dependent on NMDA receptor activation. MK801 impaired recall performance across all groups and reduced
IEG activation across hippocampal and prefrontal regions. Finally, IEG results revealed divergent patterns of Zif268 and c-Fos activity and support the suggestion that
Zif268 plays a functional role in the recall of long-term memories.
Item Type: | Article |
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Keywords: | glutamate receptors; immediate early gene; Morris water maze; rodents; spatial learning; |
Academic Unit: | Assisting Living & Learning,ALL institute Faculty of Science and Engineering > Psychology Faculty of Science and Engineering > Research Institutes > Human Health Institute |
Item ID: | 16374 |
Identification Number: | 10.1111/ejn.14768 |
Depositing User: | Dr. Sean Commins |
Date Deposited: | 28 Jul 2022 10:54 |
Journal or Publication Title: | European Journal of Neuroscience |
Publisher: | Wiley-Blackwell Publishing Ltd. |
Refereed: | Yes |
Related URLs: | |
URI: | https://mu.eprints-hosting.org/id/eprint/16374 |
Use Licence: | This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here |
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