title: Blind man living in normal society has circadian rhythms of 24.9 hours.
abstract: A psychologically normal blind man, living and working in normal society, suffered from a severe cyclic sleep-wake disorder. Investigations showed that he had circadian rhythms of body temperature, alertness, performance, cortisol secretion, and urinary electrolyte excretion which were desynchronized from the 24-hour societal schedule. These rhythms all had periods which were longer than 24 hours and indistinguishable from the period of the lunar day.
mesh_terms: D000328:Adult; D001766:Blindness / Q000503:physiopathology*; D001831:Body Temperature; D002940:Circadian Rhythm; D004573:Electrolytes / Q000652:urine; D013006:Growth Hormone / Q000097:blood; D006339:Heart Rate; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D008297:Male; D012119:Respiration; D012893:Sleep Wake Disorders / Q000503:physiopathology*; D014851:Wakefulness / Q000502:physiology*
chemical_list: D004573:Electrolytes; D013006:Growth Hormone; D006854:Hydrocortisone