乳幼児の健康的な成長と光環境 : 24時間型社会に生きる子ども達にとってあるべき光環境とは(<特集>健康のための光)

概要

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Evening-typed infants showed low quality of sleep, short-sleep hours and lower mental health like as depression and anger based on continuous epidemiological studies performed in 2003-2008. Such studies also suggested that, first, sun-light exposure within three to four hours after the bottom point (early in the morning) of body temperature can make circadian-rhythm phase advanced, second, sun-light exposure after breakfast also make the children shifted to morning-type due to promoting serotonin synthesis in pineal, and third, the lighting with low color temperature lights in the first-half of subjective-night (evening) can make it sure that plasma-melatonin level in the night is kept high and circadian phase is in advance.
2009-03-01