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Duarte,L.L.; Menna-Barreto,L.; Miguel,M.A.L.; Louzada,F.; Araújo,J.; Alam,M.; Areas,R.; Pedrazzoli,M.. |
Chronotype is an established concept designed to identify distinct phase relationships between the expression of circadian rhythms and external synchronizers in humans. Although it has been widely accepted that chronotype is subjected to ontogenetic modulation, there is no consensus on the interaction between age and gender. This study aimed to determine the relationship between age- and gender-related changes in the morningness-eveningness character in a large sample of people. A total of 14,650 volunteers were asked to complete the Brazilian version of the Horne and Östberg chronotype questionnaire. The data demonstrated that, on average, women were more morning-oriented than men until the age of 30 and there were no significant differences between men... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chronotype; Gender; Ontogeny; Circadian rhythms; Sleep timing. |
Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000400316 |
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Korczak,A.L.; Martynhak,B.J.; Pedrazzoli,M.; Brito,A.F.; Louzada,F.M.. |
Inter-individual differences in the phase of the endogenous circadian rhythms have been established. Individuals with early circadian phase are called morning types; those with late circadian phase are evening types. The Horne and Östberg Morningness-Eveningness Questionnaire (MEQ) is the most frequently used to assess individual chronotype. The distribution of MEQ scores is likely to be biased by several fact, ors, such as gender, age, genetic background, latitude, and social habits. The objective of the present study was to determine the effect of different social synchronizers on the sleep/wake cycle of persons with different chronotypes. Volunteers were selected from a total of 1232 UFPR undergraduate students who completed the MEQ. Thirty-two subjects... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chronotype; Sleep/wake cycle; Morning types; Evening types; Circadian rhythm; Social zeitgebers. |
Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008001000014 |
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