title: [Constancy of the circadian system of the body].
abstract: With respect to the biorhythmological selection of cosmonauts the concept of the biorhythmological status is understood as a sum total of biorhythmological properties of the human body. Two components of the biorhythmological properties of the human body. Two components of the biorhythmological status--constancy and lability of the circadian system--are described. Their interaction is discussed from the point of view of the hierarchical principle of the arrangement of the circadian system. Certain methods of quantitative evaluation of constancy of circadian rhythms are presented. Particular attention is given to the assessment of stability of the position of circadian rhythms on the 24-hour scale.
mesh_terms: D001683:Biological Clocks; D001831:Body Temperature; D002940:Circadian Rhythm; D006801:Humans; D008297:Male; D009031:Moscow; D011188:Potassium / Q000652:urine; D013026:Space Flight; D013997:Time Factors
chemical_list: D011188:Potassium
vernacular_title: Konstantnost' tsirkadiannoĭ sistemy organizma.