Cited by 232Memory and Neural MechanismsMemory Processes and InfluencesNeuroscience and Neuropharmacology Research

Neuronal activity in the hippocampus during delayed non‐match to sample performance in rats: Evidence for hippocampal processing in recognition memory

Otto, Tim, Eichenbaum, Howard·1992·Hippocampus

Abstract

Neuronal activity in the CA1 of rats was explored with regard to functional correlates of performance in an odor‐guided continuous delayed non‐match to sample task. Although different CA1 cells fired in association with each identifiable trial event, these analyses focused on cells that fired selectively during the period of odor cue sampling and response generation. The firing patterns of many of these cells reflected the match or non‐match comparison between current and previous odor cues independent of the particular stimuli that composed those comparisons. Such cells were more prevalent in sessions when performance was highly accurate. Hippocampal cells did not demonstrate stimulus‐evoked firing that persisted through the memory delay, nor did they fire differentially to session‐novel vs. repeated odor presentations. These results suggest that the hippocampus contributes to recognition memory by processing comparisons between current information and representations of previous stimuli stored in parahippocampal and neocortical structures.

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Crossref · 10.1002/hipo.450020310

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  • Place cell activity in rats can encode information about the 'what' and 'when' of events.

    “evidence suggests that place cell activity in rats can also encode information about the ‘what’ (e.g. odours and their status, i.e. match/non-match [124–126]) and ‘when’ (i.e. elapsed time [127,128]) of events.”

    From Is episodic-like memory <i>like</i> episodic memory? (2024) · cites this paper as [124]

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Authors
Otto, T., & Eichenbaum, H.
Affiliations
University of North Carolina at Chapel Hill (US)
Corresponding author
Otto, Tim
Venue
Hippocampus
Publisher
Wiley
Published
1992-07
Volume
2
Issue
3
Pages
323-334
ISSN
  • 1050-9631 (ISSN-L)
  • 1098-1063
OpenAlex
W2117977220
Cited by
232
References
58
Citations by year
2026: 1 · 2025: 1 · 2024: 3 · 2023: 5 · 2022: 3 · 2021: 4 · 2020: 2 · 2019: 4 · 2018: 7 · 2017: 5 · 2016: 5 · 2015: 5 · 2014: 7 · 2013: 8 · 2012: 5
FWCI
9.23
Type
journal article
Language
en
Open access
closed
Locations
  • Hippocampus (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation
  • National Institutes of Health (7r01ns026402-04)
  • National Institute on Aging (NIA AG09973)
  • National Institute of Neurological Disorders and Stroke (NS26402)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
hippocampal CA1, neuronal firing patterns, recognition memory, odor-guided behavior, memory comparison
MeSH terms
Animals, Evoked Potentials, Hippocampus, Male, Memory, Neurons, Odorants, Psychomotor Performance, Pyramidal Tracts, Reward, Time Factors, Rats

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