J Sleep Res October 2024 PMID 38221712

Subjective sleep onset latency is influenced by sleep structure and body heat loss in human subjects.

Ryusei Iijima, Akari Kadooka, Kairi Sugawara, Momo Fushimi, Mizuki Hosoe, Sayaka Aritake-Okada

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Abstract in brief

The study found that in healthy young adults, the subjective perception of sleep onset time (SOL) tends to be longer than the actual SOL measured objectively, and this perception is most strongly influenced by changes in body heat loss, specifically the distal-proximal skin temperature gradient (DPG).
Objective sleep parameters, such as the proportion of time spent in certain sleep stages and brain activity related to deep sleep, are significantly related to actual SOL, while subjective SOL correlates negatively with specific sleep stages and brain activity, indicating a disconnect between perception and actual sleep physiology.
The decrease in heat dissipation, especially the reduction in body heat loss before and after lights off, plays a key role in how quickly people feel they have fallen asleep, which may provide insights into understanding and treating insomnia.]

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Subjective sleep onset latency is influenced by sleep structure and body heat loss in human subjects https://t.co/DJyC6fuELX #biorxiv_physio

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Subjective sleep onset latency is influenced by sleep structure and body heat loss in human subjects https://t.co/zP4OxTOxnQ #bioRxiv

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