Cited by 155Memory and Neural MechanismsSleep and Wakefulness ResearchMemory Processes and Influences

Hippocampal sharp-wave ripples in waking and sleeping states

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Roumis, Demetris K, Frank, Loren M·2015·Current Opinion in Neurobiology

Abstract

Waking and sleeping states are privileged periods for distinct mnemonic processes. In waking behavior, rapid retrieval of previous experience aids memory-guided decision making. In sleep, a gradual series of reactivated associations supports consolidation of episodes into memory networks. Synchronized bursts of hippocampal place cells during events called sharp-wave ripples communicate associated neural patterns across distributed circuits in both waking and sleeping states. Differences between sleep and awake sharp-wave ripples, and in particular the accuracy of recapitulated experience, highlight their state-dependent roles in memory processes.

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Crossref · 10.1016/j.conb.2015.05.001

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  • Reactivation of task-relevant regions was particularly prominent during sleep oscillatory events linked to memory consolidation, such as spindles and SOs.

    “The reactivation of task-relevant regions was found to be particular prominent during sleep oscillatory events linked to memory consolidation, such as spindles and SOs.”

    From Sleep—A brain-state serving systems memory consolidation (2023) · cites this paper as [109]

    The Role of Sleep SWR Replay reports cortical reactivation during slow-wave sleep, and The Fidelity of Replay says prefrontal reactivation strength peaked near a transition in cortical slow oscillations. The paper mentions sleep spindles in its references, but our copy does not say that task-related reactivation was particularly prominent during spindles. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Sleep replay features a less faithful recapitulation of previous experience compared with wake replay.

    “Generally, sleep replay appears to feature a less faithful recapitulation of previous experience compared with wake replay.137,[154][155][156]”

    From Sleep—A brain-state serving systems memory consolidation (2023) · cites this paper as [155]

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Authors
Roumis, D. K., & Frank, L. M.
Affiliations
University of California, San Francisco (US)
Corresponding author
Frank, Loren M
Venue
Current Opinion in Neurobiology
Publisher
Elsevier BV
Published
2015-12
Volume
35
Pages
6-12
ISSN
0959-4388 (ISSN-L)
OpenAlex
W301412097
Cited by
155
References
74
Citations by year
2026: 8 · 2025: 25 · 2024: 9 · 2023: 14 · 2022: 13 · 2021: 10 · 2020: 10 · 2019: 18 · 2018: 24 · 2017: 8 · 2016: 12 · 2015: 2 · 2014: 1
FWCI
1.51
Type
journal article
Language
en
Open access
Locations
  • Current Opinion in Neurobiology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Institute of Mental Health (R01MH105174, R01MH090188)
  • National Institute of Neurological Disorders and Stroke (U01NS094288)
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
sharp-wave ripples, hippocampus, sleep, wakefulness, memory consolidation, memory retrieval, place cells, neural replay, memory-guided decision-making
MeSH terms
Animals, Hippocampus, Humans, Memory, Sleep, Wakefulness, Brain Waves

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