Cited by 44Circadian rhythm and melatoninSleep and related disordersSleep and Work-Related Fatigue

The Pattern of Entrainment of the Human Sleep-Wake Rhythm by the Natural Photoperiod in the North

Borisenkov, Mikhail F.·2011·Chronobiology International

Abstract

Recently, it was shown that the sleep-wake rhythm of the inhabitants of the temperate zone is entrained to sun time. In the North, significant seasonal changes in the photoperiod may interfere with entrainment of the circadian system to sunlight. This investigation assessed the influence of photoperiod characteristics on the sleep length and sleep-wake rhythm of residents of high latitude. The study was conducted in four towns and six villages located between 59.5?N and 67.6?N latitude between the months of October and May from 2009 through 2011 and included 2822 subjects aged 10 to 97 yrs, 1621 of whom were females and 1201 males. The chronotype and sleep length of the subjects were assessed using the Munich Chronotype Questionnaire. The instructions for the questionnaire stressed the need to specify the sleep-wake schedule during the week preceding the date of completing the questionnaire. The study found that the length of sleep and the chronotype of the inhabitants surveyed in Northern European Russia depend on age, sex, type of settlement, and place of residence. The time of sunrise was a stronger predictor of sleep length and chronotype than the time of sunset and day length. A later chronotype and shorter sleep length were found for the subjects during the equinox (sunrise at 06:00 h) than under long-photoperiod conditions (sunrise at 04:00-05:00 h). During short-photoperiod conditions (sunrise at 07:00-10:00 h), no significant changes in the self-reported sleep-wake rhythm were found. The time of sunrise had the strongest impact on the sleep-wake rhythm of 30- to 97-yr-old persons. Sunrise had a stronger influence on chronotype and sleep length in January to May, when the days become longer, than in October to December, when the days become shorter. Age- and season-associated changes were found in the entrainment of the sleep-wake rhythm by photoperiod in the North.

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Crossref · 10.3109/07420528.2011.623978

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  • The chronotype of adolescents and young adults (ages 13-29) was less responsive to latitude-related differences in sunrise time than that of older adults (ages 30-97).

    “For example, the chronotype of adolescents and young adults (ages 13-29) was less responsive to latitude-related differences in sunrise time than that of older adults (ages 30-97) [22].”

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Authors
Borisenkov, M. F.
Affiliations
Russian Academy of Sciences (RU)
Corresponding author
Borisenkov, Mikhail F.
Venue
Chronobiology International
Published
2011-11-14
Volume
28
Issue
10
Pages
921-929
ISSN
  • 0742-0528 (ISSN-L)
  • 1525-6073
OpenAlex
W1982125706
Cited by
44
References
24
Citations by year
2026: 4 · 2025: 1 · 2023: 3 · 2022: 2 · 2021: 2 · 2020: 1 · 2019: 4 · 2018: 6 · 2017: 2 · 2016: 4 · 2015: 4 · 2014: 3 · 2013: 3 · 2012: 5
FWCI
1.63
Type
journal article
Language
en
Open access
closed
Locations
  • Chronobiology International (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
Keywords
circadian entrainment, sleep-wake cycle, photoperiod, chronotype, high latitudes, seasonal variation, age differences, sex differences, northern European Russia, Munich Chronotype Questionnaire
MeSH terms
Adolescent, Adult, Aged, Aged, 80 and over, Aging, Child, Demography, Female, Humans, Male, Middle Aged, Russia, Sex Characteristics, Sleep, Photoperiod, Young Adult

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