In this study, basal sleep levels of pituitary hormones are measured, and the effects of all-night exposure to light adequate to produce a """"""""functional pineal-ectomy"""""""" are studied. A control night of dim light exposure also occurs. Core temperature and physical activity are monitored by means of a physiological monitoring device. This physiologic means of suppressing endogenous melatonin secretion is correlated with nocturnal hormone secretory profiles.
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