Exposure to long summer days affects the human melatonin and cortisol rhythms |
| |
Authors: | Dana Vondrašová Ivan Hájek Helena Illnerová |
| |
Abstract: | 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. |
| |
Keywords: | Circadian rhythm Photoperiod Melatonin Cortisol Human |
本文献已被 ScienceDirect 等数据库收录! |