2010 Fiscal Year Final Research Report
The effect of light emitting in daily life on human circadian rhythm
| Project/Area Number |
20370100
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied anthropology
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| Research Institution | Fukuoka Women's University |
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Principal Investigator |
MORITATA Keshi Fukuoka Women's University, 人間環境学部, 教授 (20326474)
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| Co-Investigator(Kenkyū-buntansha) |
WAKAMURA Tomoko 京都大学, 医学部, 准教授 (40240452)
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| Research Collaborator |
FUKUDA Yumi 福岡女子大学, 人間環境学部, 助手 (50551412)
TANAKA Mizuho 福岡女子大学, 人間環境学研究科, 大学院生
LAIKE Thorbjorn Lund University, Department of Architecture & Built Environment, Professor
ADAMSSON Mathias Lund University, Department of Architecture & Built Environment, PhD student
WATERHOUSE Jim Liverpool John Moorse University, Professor
BLAZEJCZYK Krzysztof University of Warsaw, Faculty of Geography and Regional Studies, Professor
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| Project Period (FY) |
2008 – 2010
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| Keywords | 環境適応能 / 生体リズム / 光 / メラトニン |
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| Research Abstract |
The purpose of this study was to investigate the annual variations of melatonin secretion of subjects and of their surrounding light conditions in Japan and Sweden. Swedish subjects got a lot of light in evening and nighttime due to long-day in summer. The annual light change in Japan was small in comparison with Sweden. The melatonin peak level decreased and the peak time advanced in summer, while in winter the peak level increased and the peak time delayed in Japan. The melatonin secretion in Sweden was lower than in Japan during the course of a year.
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