作者: Dana Vondrašová , Ivan Hájek , Helena Illnerová
DOI: 10.1016/S0006-8993(97)00358-2
关键词: Morning 、 photoperiodism 、 Sunrise 、 Circadian rhythm 、 Melatonin 、 Hydrocortisone 、 Internal medicine 、 Nocturnal 、 Animal science 、 Sunlight 、 Biology 、 Endocrinology
摘要: 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 shortened nocturnal signal by 2 relative winter patterns same followed under combined artificial photoperiod. The data suggest that days experienced from sunrise till sunset not with long evoke true day response circadian system.