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Related Experiment Videos

Sleep deprivation impairs object recognition in mice.

Svitlana Palchykova1, Raphaëlle Winsky-Sommerer, Peter Meerlo

  • 1Institute of Pharmacology and Toxicology, University of Zürich, Zürich, Switzerland.

Neurobiology of Learning and Memory
|January 21, 2006
PubMed
Summary

Sleep deprivation immediately after learning impairs memory retrieval in mice. However, delaying sleep deprivation allows for memory consolidation, preventing detrimental effects on recognition memory.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Behavioral Biology

Background:

  • Sleep is crucial for learning, memory consolidation, and retrieval in both animals and humans.
  • Sleep deprivation after learning has been shown to impair memory across various species.

Purpose of the Study:

  • To investigate the impact of sleep timing on memory consolidation and retrieval using an object recognition task in mice.
  • To determine if sleep deprivation immediately after learning or delayed sleep deprivation affects memory performance.

Main Methods:

  • Mice (OF1) were subjected to 6-hour sleep deprivation either immediately after learning (0-6 SD) or 6 hours later (7-12 SD).
  • Object recognition task was used to assess memory, with motor activity and plasma corticosterone levels also monitored.

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  • Control groups experienced undisturbed sleep periods.

    • Main Results:

    • Mice in the 0-6 SD group showed impaired recognition memory, failing to discriminate novel from familiar objects.
    • Mice in the 7-12 SD group and control groups successfully discriminated novel objects, indicating intact memory retrieval.
    • Neither sleep deprivation schedule affected familiarity detection or showed significant stress hormone level differences.

    Conclusions:

    • Sleep deprivation immediately following learning impairs recognition memory retrieval in mice.
    • Delayed sleep deprivation allows for memory consolidation, mitigating the negative effects of sleep loss.
    • Sleep's role in memory may involve active promotion or providing a state of non-interference for consolidation.