Photoperiod at birth does not modulate the diurnal preference in asian population

Chronobiology International
Motoharu TakaoHikaru Kato

Abstract

Two research groups reported that diurnal preference in Canadian and South European populations was modulated by the season of birth. The aim of the present study was to examine this association in the Japanese population. In this study, 1156 college students were administered the Morningness-Eveningness Questionnaire and asked the date and place of birth. Our results demonstrated that neither photoperiod nor season of birth modulated diurnal preference in the Japanese population. Two biological differences are reported to exist between Caucasians and Asians: polymorphisms of circadian clock genes and difference in ocular photosensitivity. These ethnic differences might characterize the circadian photosensitivity in infancy.

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Citations

Mar 5, 2013·Neuroscience and Biobehavioral Reviews·Elisabeth Brooks, Maria M Canal
Jun 1, 2014·Sleep Science·Gabriela Lemos Negri RiqueRilva Lopes de Sousa-Muñoz
Nov 8, 2012·Chronobiology International·Christian VollmerLee Di Milia
Jul 23, 2011·Chronobiology International·Balázs KapitányZoltán Rihmer
Sep 26, 2012·Chronobiology International·Ana AdanChristoph Randler
Mar 7, 2012·Chronobiology International·M F BorisenkovO N Kasyanova
Jul 30, 2011·Chronobiology International·Lorenzo TonettiVincenzo Natale
Jun 24, 2020·Chronobiology International·Renata Costa SantosTiago Gomes de Andrade
Jun 4, 2021·International Journal of Behavioral Medicine·Kyung-Shin LeeYun-Chul Hong

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