Individual sleep need is flexible and dynamically related to cognitive function

Anders M. Fjell () and Kristine B. Walhovd
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Anders M. Fjell: University of Oslo
Kristine B. Walhovd: University of Oslo

Nature Human Behaviour, 2024, vol. 8, issue 3, 422-430

Abstract: Abstract Given that sleep deprivation studies consistently show that short sleep causes neurocognitive deficits, the effects of insufficient sleep on brain health and cognition are of great interest and concern. Here we argue that experimentally restricted sleep is not a good model for understanding the normal functions of sleep in naturalistic settings. Cross-disciplinary research suggests that human sleep is remarkably dependent on environmental conditions and social norms, thus escaping universally applicable rules. Sleep need varies over time and differs between individuals, showing a complex relationship with neurocognitive function. This aspect of sleep is rarely addressed in experimental work and is not reflected in expert recommendations about sleep duration. We recommend focusing on the role of individual and environmental factors to improve our understanding of the relationship between human sleep and cognition.

Date: 2024
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DOI: 10.1038/s41562-024-01827-6

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