Cited by 27Memory and Neural MechanismsNeuroscience and Neuropharmacology ResearchSpatial Cognition and Navigation

The postsubiculum and spatial learning: the role of postsubicular synaptic activity and synaptic plasticity in hippocampal place cell, object, and object-location memory

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Bett, David, Stevenson, Cassie H., Shires, Kate L., Smith, Michael T., Martin, Stephen J., Dudchenko, Paul A., Wood, Emma R.·2013·The Journal of Neuroscience

Abstract

Visual landmarks exert stimulus control over spatial behavior and the spatially tuned firing of place, head-direction, and grid cells in the rodent. However, the neural site of convergence for representations of landmarks and representations of space has yet to be identified. A potential site of plasticity underlying associations with landmarks is the postsubiculum. To test this, we blocked glutamatergic transmission in the rat postsubiculum with CNQX, or NMDA receptor-dependent plasticity with d-AP5. These infusions were sufficient to block evoked potentials from the lateral dorsal thalamus and long-term depression following tetanization of this input to the postsubiculum, respectively. In a second experiment, CNQX disrupted the stability of rat hippocampal place cell fields in a familiar environment. In a novel environment, blockade of plasticity with d-AP5 in the postsubiculum did not block the formation of a stable place field map following a 6 h delay. In a final behavioral experiment, postsubicular infusions of both compounds blocked object-location memory in the rat, but did not affect object recognition memory. These results suggest that the postsubiculum is necessary for the recognition of familiar environments, and that NMDA receptor-dependent plasticity in the postsubiculum is required for the formation of new object-place associations that support recognition memory. However, plasticity in the postsubiculum is not necessary for the formation of new spatial maps.

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Authors
Bett, D., Stevenson, C. H., Shires, K. L., Smith, M. T., Martin, S. J., Dudchenko, P. A., & Wood, E. R.
Affiliations
  • University of Stirling (GB)
  • University of Edinburgh (GB)
Venue
The Journal of Neuroscience
Published
2013-04-17
Volume
33
Issue
16
Pages
6928-6943
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2153135146
Cited by
27
References
52
Citations by year
2026: 3 · 2024: 4 · 2023: 2 · 2022: 1 · 2021: 1 · 2020: 2 · 2019: 2 · 2018: 1 · 2017: 2 · 2016: 5 · 2015: 1 · 2014: 1 · 2013: 2
FWCI
1.64
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, cc-by-nc-sa)
  • Discovery Research Portal (University of Dundee) (submittedVersion)
  • Stirling Online Research Repository (University of Stirling) (submittedVersion, public-domain)
  • ORCA Online Research @Cardiff (Cardiff University) (submittedVersion)
Funders
Biotechnology and Biological Sciences Research Council (BB/D001714/1)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Physical Sciences › Engineering › Automotive Engineering › Spatial Cognition and Navigation
Keywords
postsubiculum, spatial learning, object location memory, object recognition memory, long-term depression, CNQX, D-AP5, hippocampal place fields, spatial maps, visual landmarks, rodents
MeSH terms
Action Potentials, Animals, Conditioning, Operant, Exploratory Behavior, Hippocampus, Learning, Male, Neural Pathways, Neuronal Plasticity, Neurons, Photic Stimulation, Spatial Behavior, Visual Perception, 2-Amino-5-phosphonovalerate, Excitatory Amino Acid Antagonists, 6-Cyano-7-nitroquinoxaline-2,3-dione, Excitatory Postsynaptic Potentials, Recognition, Psychology, Rats

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