Cited by 11Memory and Neural MechanismsMemory Processes and InfluencesSleep and Wakefulness Research

Prolonged inactivation of the hippocampus reveals temporally graded retrograde amnesia for unreinforced spatial learning in rats

Gaskin, Stéphane, Tardif, Marilyn, Mumby, Dave G.·2011·Neurobiology of Learning and Memory

Abstract

We investigated whether systems consolidation of spatial memory could be detected in a non-navigational, spatial-learning test that takes advantage of rats' natural propensity to preferentially investigate an object that was displaced relative to spatial cues more than an object that remained stationary. Previous studies using navigational spatial-learning tests have generally failed to reveal temporally-graded retrograde amnesia, possibly because the hippocampus needs to be intact for the retrieval and/or processing of navigational information during the test. In the present study, the hippocampus of rats was kept inactivated, at two sites along its septo-temporal axis (dorsal and intermediate), for four consecutive days, beginning either 3h or 5 days after familiarization to two identical objects in an open field. Rats that had their hippocampus inactivated beginning 5 days but not 3h after familiarization showed evidence that they remembered the previous location of the displaced object. The results suggest that systems consolidation of spatial memories can be detected using a non-navigational test of spatial memory.

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Crossref · 10.1016/j.nlm.2011.06.001

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Authors
Gaskin, S., Tardif, M., & Mumby, D. G.
Affiliations
Concordia University (CA)
Corresponding author
Gaskin, Stéphane
Venue
Neurobiology of Learning and Memory
Publisher
Elsevier BV
Published
2011-09
Volume
96
Issue
2
Pages
288-296
ISSN
1074-7427 (ISSN-L)
OpenAlex
W2163339613
Cited by
11
References
69
Citations by year
2021: 1 · 2020: 1 · 2016: 1 · 2015: 2 · 2014: 1 · 2013: 1 · 2012: 4
FWCI
0.97
Type
journal article
Language
en
Open access
closed
Locations
  • Neurobiology of Learning and Memory (publishedVersion)
  • PubMed (publishedVersion)
Funders
Natural Sciences and Engineering Research Council of Canada
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
Keywords
hippocampal inactivation, retrograde amnesia, systems consolidation, spatial memory, object displacement, rats
MeSH terms
Amnesia, Retrograde, Animals, Hippocampus, Male, Reinforcement, Psychology, Retention, Psychology, Space Perception, Maze Learning, Rats, Long-Evans, Rats

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