Seasonal changes in human sleep-wake rhythm in Antarctica and Japan

Akira Usui; Ichio Obinata; Yoshikazu Ishizuka; Tamio Okado; Hitoshi Fukuzawa; Shigenobu Kanba

doi:10.1046/j.1440-1819.2000.00715.x

Seasonal changes in human sleep-wake rhythm in Antarctica and Japan

Akira Usui, Ichio Obinata, Yoshikazu Ishizuka, Tamio Okado, Hitoshi Fukuzawa, Shigenobu Kanba

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

The subjects were eight men of the Japanese Antarctic Research Expedition (average age 35.8 years), and 10 healthy people living around Kofu, Japan (28.9 years). They completed a sleep log for 12 to 18 months, and the sleep-wake state was scored in 10-min epochs. Q₂₄ values calculated by χ² periodgram were low in the Antarctic midwinter. This means that there was difficulty in synchronizing to a 24-h period in the Antarctic midwinter. In Antarctica, sleep onset and offset times were delayed mostly in the midwinter. In Japan, sleep offset time was delayed mostly around the winter solstice.

Original language	English
Pages (from-to)	361-362
Number of pages	2
Journal	Psychiatry and clinical neurosciences
Volume	54
Issue number	3
DOIs	https://doi.org/10.1046/j.1440-1819.2000.00715.x
Publication status	Published - Jun 2000
Externally published	Yes

All Science Journal Classification (ASJC) codes

Neuroscience(all)
Neurology
Clinical Neurology
Psychiatry and Mental health

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1046/j.1440-1819.2000.00715.x

Cite this

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title = "Seasonal changes in human sleep-wake rhythm in Antarctica and Japan",

abstract = "The subjects were eight men of the Japanese Antarctic Research Expedition (average age 35.8 years), and 10 healthy people living around Kofu, Japan (28.9 years). They completed a sleep log for 12 to 18 months, and the sleep-wake state was scored in 10-min epochs. Q24 values calculated by χ2 periodgram were low in the Antarctic midwinter. This means that there was difficulty in synchronizing to a 24-h period in the Antarctic midwinter. In Antarctica, sleep onset and offset times were delayed mostly in the midwinter. In Japan, sleep offset time was delayed mostly around the winter solstice.",

author = "Akira Usui and Ichio Obinata and Yoshikazu Ishizuka and Tamio Okado and Hitoshi Fukuzawa and Shigenobu Kanba",

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AU - Usui, Akira

AU - Obinata, Ichio

AU - Ishizuka, Yoshikazu

AU - Okado, Tamio

AU - Fukuzawa, Hitoshi

AU - Kanba, Shigenobu

PY - 2000/6

Y1 - 2000/6

N2 - The subjects were eight men of the Japanese Antarctic Research Expedition (average age 35.8 years), and 10 healthy people living around Kofu, Japan (28.9 years). They completed a sleep log for 12 to 18 months, and the sleep-wake state was scored in 10-min epochs. Q24 values calculated by χ2 periodgram were low in the Antarctic midwinter. This means that there was difficulty in synchronizing to a 24-h period in the Antarctic midwinter. In Antarctica, sleep onset and offset times were delayed mostly in the midwinter. In Japan, sleep offset time was delayed mostly around the winter solstice.

AB - The subjects were eight men of the Japanese Antarctic Research Expedition (average age 35.8 years), and 10 healthy people living around Kofu, Japan (28.9 years). They completed a sleep log for 12 to 18 months, and the sleep-wake state was scored in 10-min epochs. Q24 values calculated by χ2 periodgram were low in the Antarctic midwinter. This means that there was difficulty in synchronizing to a 24-h period in the Antarctic midwinter. In Antarctica, sleep onset and offset times were delayed mostly in the midwinter. In Japan, sleep offset time was delayed mostly around the winter solstice.

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Seasonal changes in human sleep-wake rhythm in Antarctica and Japan

Abstract

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