The importance of light, postural and social cues in the regulation of the plasma cortisol rhythm in manA series of experiments was conducted to assess the role of photoperiodic postural and social cues in the regulation of the plasma cortisol rhythm in normal human subjects. Young healthy adult male volunteers, aged 20-25, were used as the test subjects and were selected following extensive physical and psychological examinations. The time at which peak plasma cortisol concentration occurred was calculated from harmonic curves fitted to each set of 24-hr data from each subject. The findings suggest that the plasma cortisol rhythm is not affected appreciably by the absence of postural change, whereas light and social interaction affect this rhythm profoundly.
Document ID
19790063385
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Vernikos-Danellis, J. (NASA Ames Research Center Moffett Field, CA, United States)
Winget, C. M. (NASA Ames Research Center Biomedical Research Div., Moffett Field, Calif., United States)