Latitudinal cline of chronotype

Abstract The rotation of the Earth around its own axis and around the sun determines the characteristics of the light/dark cycle, the most stable and ancient 24 h temporal cue for all organisms. Due to the tilt in the earth’s axis in relation to the plane of the earth’s orbit around the sun, sunligh...

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Autores principales:	Mario André Leocadio-Miguel, Fernando Mazzili Louzada, Leandro Lourenção Duarte, Roberta Peixoto Areas, Marilene Alam, Marcelo Ventura Freire, John Fontenele-Araujo, Luiz Menna-Barreto, Mario Pedrazzoli
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/19f1acb625614fce88f31479ecaa4078
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spelling	oai:doaj.org-article:19f1acb625614fce88f31479ecaa40782021-12-02T16:06:06ZLatitudinal cline of chronotype10.1038/s41598-017-05797-w2045-2322https://doaj.org/article/19f1acb625614fce88f31479ecaa40782017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05797-whttps://doaj.org/toc/2045-2322Abstract The rotation of the Earth around its own axis and around the sun determines the characteristics of the light/dark cycle, the most stable and ancient 24 h temporal cue for all organisms. Due to the tilt in the earth’s axis in relation to the plane of the earth’s orbit around the sun, sunlight reaches the Earth differentially depending on the latitude. The timing of circadian rhythms varies among individuals of a given population and biological and environmental factors underlie this variability. In the present study, we tested the hypothesis that latitude is associated to the regulation of circadian rhythm in humans. We have studied chronotype profiles across latitudinal cline from around 0° to 32° South in Brazil in a sample of 12,884 volunteers living in the same time zone. The analysis of the results revealed that humans are sensitive to the different sunlight signals tied to differences in latitude, resulting in a morning to evening latitudinal cline of chronotypes towards higher latitudes.Mario André Leocadio-MiguelFernando Mazzili LouzadaLeandro Lourenção DuarteRoberta Peixoto AreasMarilene AlamMarcelo Ventura FreireJohn Fontenele-AraujoLuiz Menna-BarretoMario PedrazzoliNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-6 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mario André Leocadio-Miguel Fernando Mazzili Louzada Leandro Lourenção Duarte Roberta Peixoto Areas Marilene Alam Marcelo Ventura Freire John Fontenele-Araujo Luiz Menna-Barreto Mario Pedrazzoli Latitudinal cline of chronotype
description	Abstract The rotation of the Earth around its own axis and around the sun determines the characteristics of the light/dark cycle, the most stable and ancient 24 h temporal cue for all organisms. Due to the tilt in the earth’s axis in relation to the plane of the earth’s orbit around the sun, sunlight reaches the Earth differentially depending on the latitude. The timing of circadian rhythms varies among individuals of a given population and biological and environmental factors underlie this variability. In the present study, we tested the hypothesis that latitude is associated to the regulation of circadian rhythm in humans. We have studied chronotype profiles across latitudinal cline from around 0° to 32° South in Brazil in a sample of 12,884 volunteers living in the same time zone. The analysis of the results revealed that humans are sensitive to the different sunlight signals tied to differences in latitude, resulting in a morning to evening latitudinal cline of chronotypes towards higher latitudes.
format	article
author	Mario André Leocadio-Miguel Fernando Mazzili Louzada Leandro Lourenção Duarte Roberta Peixoto Areas Marilene Alam Marcelo Ventura Freire John Fontenele-Araujo Luiz Menna-Barreto Mario Pedrazzoli
author_facet	Mario André Leocadio-Miguel Fernando Mazzili Louzada Leandro Lourenção Duarte Roberta Peixoto Areas Marilene Alam Marcelo Ventura Freire John Fontenele-Araujo Luiz Menna-Barreto Mario Pedrazzoli
author_sort	Mario André Leocadio-Miguel
title	Latitudinal cline of chronotype
title_short	Latitudinal cline of chronotype
title_full	Latitudinal cline of chronotype
title_fullStr	Latitudinal cline of chronotype
title_full_unstemmed	Latitudinal cline of chronotype
title_sort	latitudinal cline of chronotype
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/19f1acb625614fce88f31479ecaa4078
work_keys_str_mv	AT marioandreleocadiomiguel latitudinalclineofchronotype AT fernandomazzililouzada latitudinalclineofchronotype AT leandrolourencaoduarte latitudinalclineofchronotype AT robertapeixotoareas latitudinalclineofchronotype AT marilenealam latitudinalclineofchronotype AT marceloventurafreire latitudinalclineofchronotype AT johnfontenelearaujo latitudinalclineofchronotype AT luizmennabarreto latitudinalclineofchronotype AT mariopedrazzoli latitudinalclineofchronotype
_version_	1718385072758849536

Latitudinal cline of chronotype

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