Domain-specific circadian rescue following sleep deprivation
Abstract
Study objectives: Circadian rhythms regulate sleep-wake cycles and modulate cognitive functions over a 24-h period. Following sleep loss, certain cognitive performance partially rebounds in the early evening, a phenomenon known as circadian rescue. Yet, the magnitude and domain specificity of circadian rescue remain poorly understood. Here, we integrate experimental and meta-analytic approaches to differential contributions of circadian and homeostatic processes to cognitive rescue following sleep deprivation.
Methods: In study 1, 54 healthy adults remained awake for 35 consecutive hours while repeatedly completing the Psychomotor Vigilance Task, the Digit Symbol Substitution Test, and the Karolinska Sleepiness Scale. Performance dynamics were modeled using the two-process framework of sleep regulation. In study 2, a meta-analysis of published data contextualized these findings across protocols.
Results: Results reveal domain-specific circadian recovery rates of 33.0%-52.1% for Psychomotor Vigilance Task, 45.7% for Digit Symbol Substitution Test, and 23.5% for Karolinska Sleepiness Scale, indicating that subjective sleepiness is predominantly driven by homeostatic load, whereas objective cognitive performance retains significant circadian modulation under conditions of acute homeostatic pressure.
Conclusions: These findings clarify how circadian and homeostatic drives interact to shape cognitive task performance and subjective sleepiness outcomes under sleep loss, with…
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Evidence Hub reads this as a meta-analysis, done in people. Its evidence level is 1 of 5 (Highest · pooled evidence). Pooled evidence from several studies sits at the top of the evidence pyramid.
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