Melatonin rhythm observed throughout a three-cycle bright-light stimulus designed to reset the human circadian pacemaker

• Published in: Journal of biological rhythms Vol. 14; no. 3; p. 237
• Main Authors: Shanahan, T L, Kronauer, R E, Duffy, J F, Williams, G H, Czeisler, C A
• Format: Journal Article
• Language: English
• Published: United States 01.06.1999
• Subjects: Adolescent; Adult; Body Temperature - physiology; Circadian Rhythm - physiology; Circadian Rhythm - radiation effects; Darkness; Dose-Response Relationship, Radiation; Humans; Light; Male; Melatonin - blood; NASA Discipline Regulatory Physiology; Non-NASA Center

Exposure to light and darkness can rapidly induce phase shifts of the human circadian pacemaker. A type 0 phase response curve (PRC) to light that has been reported for humans was based on circadian phase data collected from constant routines performed before and after a three-cycle light stimulus,...