Cited by 88Sleep and Wakefulness ResearchMemory and Neural MechanismsMemory Processes and Influences

Dynamics of a Memory Trace: Effects of Sleep on Consolidation

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Jackson, Claire, McCabe, Brian J., Nicol, Alister U., Grout, Amanda S., Brown, Malcolm W., Horn, Gabriel·2008·Current Biology

Abstract

Background There is evidence that sleep is important for memory consolidation, but the underlying neuronal changes are not well understood. We studied the effect of sleep modulation on memory and on neuronal activity in a memory system of the domestic chick brain after the learning process of imprinting. Neurons in this system become, through imprinting, selectively responsive to a training (imprinting) stimulus and so possess the properties of a memory trace.Results The proportion of neurons responsive to the training stimulus reaches a maximum the day after training. We demonstrate that sleep is necessary for this maximum to be achieved, that sleep stabilizes the initially unstable, selective responses of neurons to the imprinting stimulus, and that for sleep to be effective, it must occur during a particular period of time after training. During this period, there is a time-dependent increase in EEG activity in the 5-6 Hz band, that is, in the lower range of the theta bandwidth. The effects of sleep disturbance on consolidation cannot be attributed to fatigue or to stress.Conclusions We establish that long-term trace consolidation requires sleep within a restricted period shortly after learning. Undisturbed sleep is necessary for the stabilization of long-term memory, measured at the behavioral and neuronal levels, and of long-term but not short-term neuronal responsiveness to the training stimulus.

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Crossref · 10.1016/j.cub.2008.01.062

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  • A more recent study compellingly demonstrated a critical involvement of sleep in consolidation of the imprinting stimulus.

    “Results from a more recent study compellingly demonstrated a critical involvement of sleep in the consolidation of the imprinting stimulus (600).”

    From About Sleep's Role in Memory (2013) · cites this paper as [600]

  • Chicks with disturbed sleep in the first 6-h interval after training and undisturbed sleep in the second interval showed no significant memory for the imprinting stimulus and a strong decrease in responsive IMM neurons.

    “In contrast, chicks that experienced disturbed sleep in the first 6-h interval after training and undisturbed sleep in the second 6-h interval, at final testing did not exhibit any significant memory for the imprinting stimulus and showed a strong decrease in the number of IMM neurons responsive to the imprinting stimulus.”

    From About Sleep's Role in Memory (2013) · cites this paper as [600]

  • Tracking of individual IMM neurons suggested that sleep shortly after imprinting stabilizes the memory representation by supporting recovery of responsiveness of cells that had ceased to respond, with this effect requiring some hours.

    “Interestingly, tracking of individual IMM neurons revealed a pattern suggesting that sleep shortly after imprinting training stabilizes the memory representation by supporting the recovery of responsiveness of cells that for any reasons had ceased to respond to the imprinting stimulus in the course of training or shortly afterwards, with this effect requiring some hours to occur (600, 1150).”

    From About Sleep's Role in Memory (2013) · cites this paper as [600]

  • In that study, final testing after the second sleep period revealed stable memory for the imprinting stimulus and an overall doubled number of IMM neurons responding to the imprinting stimulus compared with before sleep.

    “Final testing after the second sleep period revealed a stable memory for the imprinting stimulus together with an overall doubled number of IMM neurons responding to the imprinting stimulus (compared to imprinting training before sleep).”

    From About Sleep's Role in Memory (2013) · cites this paper as [600]

  • Chicks with undisturbed sleep after imprinting displayed an increase in EEG SWA covering the 0-6 Hz frequency band during this period.

    “In addition, chicks with undisturbed sleep after imprinting displayed an increase in EEG SWA covering the 0 -6 Hz frequency band during this period.”

    From About Sleep's Role in Memory (2013) · cites this paper as [600]

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Authors
Jackson, C., McCabe, B. J., Nicol, A. U., Grout, A. S., Brown, M. W., & Horn, G.
Affiliations
  • University of Cambridge (GB)
  • Babraham Institute (GB)
  • University of Bristol (GB)
Corresponding author
McCabe, Brian J.
Venue
Current Biology
Publisher
Elsevier BV
Published
2008-03
Volume
18
Issue
6
Pages
393-400
ISSN
0960-9822 (ISSN-L)
OpenAlex
W2067697035
Cited by
88
References
52
Citations by year
2026: 2 · 2025: 5 · 2023: 2 · 2022: 4 · 2021: 4 · 2020: 8 · 2019: 4 · 2018: 1 · 2017: 7 · 2016: 3 · 2015: 4 · 2014: 13 · 2013: 7 · 2012: 4
FWCI
3.27
Type
journal article
Language
en
Open access
Locations
  • Current Biology (publishedVersion)
  • PubMed (publishedVersion)
  • Explore Bristol Research (submittedVersion)
  • Bristol Research (University of Bristol) (submittedVersion)
Funders
Biotechnology and Biological Sciences Research Council (S18043)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
Keywords
sleep, memory consolidation, memory traces, imprinting, domestic chicks, neuronal responsiveness, theta oscillations, sleep timing, sleep disorders, long-term memory
MeSH terms
Animals, Chickens, Electroencephalography, Imprinting, Psychological, Neurons, Sleep, Time Factors, Vocalization, Animal, Recognition, Psychology

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