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Sleep schedules and peak times of oral temperature and alertness in morning and evening 'types'



Sleep schedules and peak times of oral temperature and alertness in morning and evening 'types'



Ergonomics 25(9): 821-827



The relation between circadian variables (oral temperature and subjective alertness) and sleep-awake schedules was explored as a function of a subjective preference index which classifies subjects as morning or evening type. Measurements of oral temperature and self-assessed alertness were obtained every 3 h from rising time to bedtime over a 2 wk period in 49 medical students. Sleep logs were kept by the students during the same period. Sleep schedules and alertness peak time, as well as the relative temporal location of alertness peak time and temperature peak time, differed in relation to the Horne and Osteberg index. In normal conditions the coupling between temperature circadian rhythm and sleep-awake cycle differs in morning types and evening types.

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Accession: 006426836

Download citation: RISBibTeXText

PMID: 7173167

DOI: 10.1080/00140138208925038



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