SEASONAL PATTERNS OF SLEEP STAGES AND SECRETION OF CORTISOL AND GROWTH HORMONE DURING 24 HOUR PERIODS IN NORTHERN NORWAY

ABSTRACT A group of 7 healthy male subjects was studied in regard to sleep stages and 24 h plasma cortisol and growth hormone patterns during the 4 seasons of the year in an Arctic environment (Tromsø, Norway). No difference in total sleep or sleep stage per cents was found for any of the yearly sea...

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Bibliographic Details
Published in:Acta Endocrinologica
Main Authors: Weitzman, Elliot D., deGraaf, Andries S., Sassin, Jon F., Hansen, Tomar, Godtlibsen, Ole B., Perlow, Mark, Hellman, Leon
Format: Article in Journal/Newspaper
Language:unknown
Published: Oxford University Press (OUP) 1975
Subjects:
Endocrinology
General Medicine
Endocrinology, Diabetes and Metabolism
Arctic
Northern Norway
Tromsø
Online Access:http://dx.doi.org/10.1530/acta.0.0780065
https://eje.bioscientifica.com/view/journals/eje/78/1/acta_78_1_008.xml
Description
Summary:ABSTRACT A group of 7 healthy male subjects was studied in regard to sleep stages and 24 h plasma cortisol and growth hormone patterns during the 4 seasons of the year in an Arctic environment (Tromsø, Norway). No difference in total sleep or sleep stage per cents was found for any of the yearly seasons. A small but statistical significant increase in mean plasma cortisol concentration and amount secreted for 24 h was found for the autumn-winter seasons, as compared with the spring and summer. However, no difference in the circadian curve of cortisol hormonal pattern was found. All subjects secreted growth hormone shortly after sleep onset at night and no difference was found as a function of season of the year.

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