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Related Experiment Video

Updated: Jun 7, 2025

The Rodent Psychomotor Vigilance Test rPVT: A Method for Assessing Neurobehavioral Performance in Rats and Mice
07:47

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Sleep Disruption Impairs Sustained Attention in Food-Restricted Rats Using a Food-Reinforced Rodent Psychomotor

Catherine M Davis1,2,3, Victoria Elizabeth Elliott1,2, Joan Smith2

  • 1Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.

Nature and Science of Sleep
|November 14, 2024
PubMed
Summary

Sleep disruption significantly impairs attention in rats, even when food restriction is used to maintain high performance. This suggests food restriction does not fully protect against attention deficits caused by sleep loss.

Keywords:
food restrictionoperant behaviorvigilance

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Area of Science:

  • Neuroscience
  • Behavioral Science

Background:

  • Sleep disruption (SD) is known to impair sustained attention in humans, typically measured by the psychomotor vigilance test (PVT).
  • In rodent models, food restriction often attenuates the effects of SD on sustained attention, limiting the translational validity of rodent vigilance tests.

Purpose of the Study:

  • To determine if a rodent PVT (rPVT) is sensitive to the effects of SD.
  • To investigate if high baseline performance, achieved through food restriction and reinforcement, can reveal SD-induced attention deficits in rats.

Main Methods:

  • Male Long-Evans rats (n=4) were trained on an rPVT using food reinforcement to achieve high baseline performance.
  • Rats underwent acute SD using an automated sweep bar in their home cage.
  • Performance on the rPVT was assessed the day following SD.

Main Results:

  • Sleep disruption significantly increased lapses in the rPVT, particularly at shorter response-stimulus intervals.
  • A decrease in percent correct responses and an increase in slow reaction times were observed following SD.
  • These findings indicate that food restriction did not attenuate the performance-impairing effects of SD in this rPVT procedure.

Conclusions:

  • The rodent PVT (rPVT) is sensitive to the attention-impairing effects of sleep disruption in food-restricted rats.
  • Food restriction does not appear to universally attenuate the impact of sleep disruption on attention-related behavioral tasks.