Cited by 958Memory and Neural MechanismsSleep and Wakefulness ResearchMemory Processes and Influences

Hippocampal replay in the awake state: a potential substrate for memory consolidation and retrieval

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Carr, Margaret F, Jadhav, Shantanu P, Frank, Loren M·2011·Nature Neuroscience

Abstract

The hippocampus is required for the encoding, consolidation and retrieval of event memories. Although the neural mechanisms that underlie these processes are only partially understood, a series of recent papers point to awake memory replay as a potential contributor to both consolidation and retrieval. Replay is the sequential reactivation of hippocampal place cells that represent previously experienced behavioral trajectories and occurs frequently in the awake state, particularly during periods of relative immobility. Awake replay may reflect trajectories through either the current environment or previously visited environments that are spatially remote. The repetition of learned sequences on a compressed time scale is well suited to promote memory consolidation in distributed circuits beyond the hippocampus, suggesting that consolidation occurs in both the awake and sleeping animal. Moreover, sensory information can influence the content of awake replay, suggesting a role for awake replay in memory retrieval.

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  • There is evidence that humans do repeat some of the information they process (e.g., in memory replay).

    “there is evidence that humans do repeat some of the information they process (e.g., in memory replay, Carr et al., 2011).”

    From Findings of the BabyLM Challenge: Sample-Efficient Pretraining on Developmentally Plausible Corpora (2023) · cites this paper as Carr et al., 2011

    The ‘Awake replay of the local environment’ section (page unavailable) reports that animals repeatedly replayed sequences representing previously experienced trajectories. This supports the memory-replay example, but the passage concerns animals, not evidence that humans do this. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Awake memory reactivations have been shown to enhance subsequent recall performance.

    “awake memory reactivations have been shown to enhance subsequent recall performance.”

    From Sleep—A brain-state serving systems memory consolidation (2023) · cites this paper as [151]

    In “Linking awake replay and memory consolidation” (page unavailable), the review reports that the strength of awake reactivation predicted subsequent memory-task performance in animals. That supports an association, but not the claim that reactivation was shown to enhance subsequent recall performance: the passage does not establish a causal improvement or identify a recall measure. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

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Research works printed but not linked: 1

  1. [19]Squire LR Clark RE Knowlton BJ Retrograde amnesia Hippocampus 2001 11 50 55 11261772

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Authors
Carr, M. F., Jadhav, S. P., & Frank, L. M.
Affiliations
University of California, San Francisco (US)
Corresponding author
Frank, Loren M
Venue
Nature Neuroscience
Published
2011-01-26
Volume
14
Issue
2
Pages
147-153
ISSN
  • 1097-6256 (ISSN-L)
  • 1546-1726
OpenAlex
W1974367810
Cited by
958
References
82
Citations by year
2026: 52 · 2025: 93 · 2024: 79 · 2023: 61 · 2022: 75 · 2021: 55 · 2020: 60 · 2019: 79 · 2018: 85 · 2017: 75 · 2016: 59 · 2015: 46 · 2014: 53 · 2013: 36 · 2012: 33
FWCI
3.78
Type
journal article
Language
en
Open access
Locations
  • Nature Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Mental Health (R01MH080283)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
Keywords
hippocampal replay, awake state, memory consolidation, memory retrieval, place cells, hippocampus, spatial memory, event memory, sleep-dependent memory, sensory input, neural reactivation
MeSH terms
Hippocampus, Humans, Memory, Neurons, Sleep, Wakefulness

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