Exposure to long summer days affects the human melatonin and cortisol rhythms
Language English Country Netherlands Media print
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
9219878
DOI
10.1016/s0006-8993(97)00358-2
PII: S0006-8993(97)00358-2
Knihovny.cz E-resources
- MeSH
- Circadian Rhythm * MeSH
- Photoperiod * MeSH
- Hydrocortisone metabolism MeSH
- Humans MeSH
- Melatonin metabolism MeSH
- Adolescent MeSH
- Lighting MeSH
- Seasons * MeSH
- Saliva metabolism radiation effects MeSH
- Sunlight MeSH
- Check Tag
- Humans MeSH
- Adolescent MeSH
- Male MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Hydrocortisone MeSH
- Melatonin MeSH
Exposure of 8 human subjects in summer to a natural 16 h bright light photoperiod phase advanced the morning salivary melatonin decline and cortisol rise and shortened the nocturnal melatonin signal by 2 h relative to the winter patterns of the same subjects followed under a combined artificial and natural light 16 h photoperiod. The data suggest that summer days experienced from sunrise till sunset and not winter days with a combined artificial and natural light long photoperiod evoke a true long day response of the human circadian system.
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