Please use this identifier to cite or link to this item:
Title: Latitudinal cline of chronotype
Authors: Miguel, Mario André Leocadio
Louzada, Fernando Mazzili
Duarte, Leandro Lourenção
Areas, Roberta Peixoto
Alam, Marilene
Freire, Marcelo Ventura
Araujo, John Fontenele
Barreto, Luiz Menna
Pedrazzoli, Mario
Keywords: chronotype;chronobiology;Latitudinal cline
Issue Date: 14-Jul-2017
Citation: MIGUEL, Mario André al. Latitudinal cline of chronotype. Scientific Reports, v. 7, p. 5437, 2017. ISSN 2045-2322. Disponível em: <>. Acesso em: 13 fev. 2019.
Portuguese 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
ISSN: 2045-2322
Appears in Collections:CB - DFIS - Artigos publicados em periódicos

Files in This Item:
File Description SizeFormat 
LatitudinalClineOfChronotype_Miguel_2017.pdf1.35 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.