Cited by 18Memory and Neural MechanismsMemory Processes and InfluencesNeurogenesis and neuroplasticity mechanisms

Contrasting networks for recognition memory and recency memory revealed by immediate-early gene imaging in the rat

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Olarte-Sánchez, Cristian M., Kinnavane, Lisa, Amin, Eman, Aggleton, John P.·2014·Behavioral Neuroscience

Abstract

The expression of the immediate-early gene c-fos was used to compare networks of activity associated with recency memory (temporal order memory) and recognition memory. In Experiment 1, rats were first familiarized with sets of objects and then given pairs of different, familiar objects to explore. For the recency test group, each object in a pair was separated by 110 min in the time between their previous presentations. For the recency control test, each object in a pair was separated by less than a 1 min between their prior presentations. Temporal discrimination of the objects correlated with c-fos activity in the recency test group in several sites, including area Te2, the perirhinal cortex, lateral entorhinal cortex, as well as the dentate gyrus, hippocampal fields CA3 and CA1. For both the test and control conditions, network models were derived using structural equation modeling. The recency test model emphasized serial connections from the perirhinal cortex to lateral entorhinal cortex and then to the CA1 subfield. The recency control condition involved more parallel pathways, but again highlighted CA1 within the hippocampus. Both models contrasted with those derived from tests of object recognition (Experiment 2), because stimulus novelty was associated with pathways from the perirhinal cortex to lateral entorhinal cortex that then involved both the dentate gyrus (and CA3) and CA1 in parallel. The present findings implicate CA1 for the processing of familiar stimuli, including recency discriminations, while the dentate gyrus and CA3 pathways are recruited when the perirhinal cortex signals novel stimuli.

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Authors
Olarte-Sánchez, C. M., Kinnavane, L., Amin, E., & Aggleton, J. P.
Affiliations
Cardiff University (GB)
Corresponding author
Kinnavane, Lisa
Venue
Behavioral Neuroscience
Published
2014-08
Volume
128
Issue
4
Pages
504-522
ISSN
  • 0735-7044 (ISSN-L)
  • 1939-0084
OpenAlex
W2034246253
Cited by
18
References
96
Citations by year
2025: 1 · 2024: 1 · 2023: 1 · 2022: 2 · 2021: 1 · 2020: 1 · 2018: 3 · 2017: 2 · 2016: 1 · 2015: 4 · 2014: 1
FWCI
1.49
Type
journal article
Language
en
Open access
Locations
  • Behavioral Neuroscience (publishedVersion, other-oa)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Explore Bristol Research (publishedVersion)
  • ORCA Online Research @Cardiff (Cardiff University) (acceptedVersion)
Funders
Wellcome Trust (WT 087955 and WT 096520)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
recognition memory, c-fos, immediate early gene expression, hippocampal CA1, dentate gyrus, CA3, perirhinal cortex, lateral entorhinal cortex, temporal order memory, object recognition, stimulus novelty, neural network model, rats
MeSH terms
Animals, Brain, Male, Memory, Models, Neurological, Nerve Net, Proto-Oncogene Proteins c-fos, Genes, Immediate-Early, Maze Learning, Recognition, Psychology, Rats

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