Melatonin rhythms in Arctic urban residents
Stokkan K‐A, Reiter RJ. Melatonin rhythms in Arctic urban residents. J. Pineal Res. 1994: 16: 33–36. Abstract The 24‐hr rhythm of salivary melatonin was measured in persons living in the city of Tromsø (70°N) at the following times of the year: in January at a day length of 2 hr of twilight, in June...
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crwiley:10.1111/j.1600-079x.1994.tb00079.x 2024-10-06T13:46:17+00:00 Melatonin rhythms in Arctic urban residents Stokkan, K.‐A. Reiter, R. J. 1994 http://dx.doi.org/10.1111/j.1600-079x.1994.tb00079.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-079X.1994.tb00079.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-079X.1994.tb00079.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Pineal Research volume 16, issue 1, page 33-36 ISSN 0742-3098 1600-079X journal-article 1994 crwiley https://doi.org/10.1111/j.1600-079x.1994.tb00079.x 2024-09-11T04:12:10Z Stokkan K‐A, Reiter RJ. Melatonin rhythms in Arctic urban residents. J. Pineal Res. 1994: 16: 33–36. Abstract The 24‐hr rhythm of salivary melatonin was measured in persons living in the city of Tromsø (70°N) at the following times of the year: in January at a day length of 2 hr of twilight, in June under continuous sunshine, and in March and September at about 12 hr light and 12 hr darkness. The hormone patterns varied widely between individuals, but, in general, they were consistent within most individuals between the seasons. Highest peak values occurred in January when the mean level was also significantly higher than at any other time of year. The lowest mean levels occurred in June. Although individual rhythms were not always apparent, the mean patterns showed significantly elevated melatonin concentrations during the night at all seasons. The June melatonin peak was similar to that in March and September, but appeared to be phase‐delayed with increased melatonin concentrations from midnight until 0900. It is assumed that the delayed melatonin peak in June may be associated with a tendency among people to shift their activity/rest rhythm and that the pineal sensitivity to light is reduced in the morning in summer. Article in Journal/Newspaper Arctic Tromsø Wiley Online Library Arctic Stokkan ENVELOPE(9.284,9.284,63.089,63.089) Tromsø Journal of Pineal Research 16 1 33 36 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Stokkan K‐A, Reiter RJ. Melatonin rhythms in Arctic urban residents. J. Pineal Res. 1994: 16: 33–36. Abstract The 24‐hr rhythm of salivary melatonin was measured in persons living in the city of Tromsø (70°N) at the following times of the year: in January at a day length of 2 hr of twilight, in June under continuous sunshine, and in March and September at about 12 hr light and 12 hr darkness. The hormone patterns varied widely between individuals, but, in general, they were consistent within most individuals between the seasons. Highest peak values occurred in January when the mean level was also significantly higher than at any other time of year. The lowest mean levels occurred in June. Although individual rhythms were not always apparent, the mean patterns showed significantly elevated melatonin concentrations during the night at all seasons. The June melatonin peak was similar to that in March and September, but appeared to be phase‐delayed with increased melatonin concentrations from midnight until 0900. It is assumed that the delayed melatonin peak in June may be associated with a tendency among people to shift their activity/rest rhythm and that the pineal sensitivity to light is reduced in the morning in summer. |
format |
Article in Journal/Newspaper |
author |
Stokkan, K.‐A. Reiter, R. J. |
spellingShingle |
Stokkan, K.‐A. Reiter, R. J. Melatonin rhythms in Arctic urban residents |
author_facet |
Stokkan, K.‐A. Reiter, R. J. |
author_sort |
Stokkan, K.‐A. |
title |
Melatonin rhythms in Arctic urban residents |
title_short |
Melatonin rhythms in Arctic urban residents |
title_full |
Melatonin rhythms in Arctic urban residents |
title_fullStr |
Melatonin rhythms in Arctic urban residents |
title_full_unstemmed |
Melatonin rhythms in Arctic urban residents |
title_sort |
melatonin rhythms in arctic urban residents |
publisher |
Wiley |
publishDate |
1994 |
url |
http://dx.doi.org/10.1111/j.1600-079x.1994.tb00079.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-079X.1994.tb00079.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-079X.1994.tb00079.x |
long_lat |
ENVELOPE(9.284,9.284,63.089,63.089) |
geographic |
Arctic Stokkan Tromsø |
geographic_facet |
Arctic Stokkan Tromsø |
genre |
Arctic Tromsø |
genre_facet |
Arctic Tromsø |
op_source |
Journal of Pineal Research volume 16, issue 1, page 33-36 ISSN 0742-3098 1600-079X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1600-079x.1994.tb00079.x |
container_title |
Journal of Pineal Research |
container_volume |
16 |
container_issue |
1 |
container_start_page |
33 |
op_container_end_page |
36 |
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1812174584201347072 |