title: [The effect of age on the antigravitational reactions of the blood circulation and the occurrence of precollapse states].
abstract: Reflex changes of heart rate, respiratory rate, and arterial pressure were studied by a new continuous bloodless method in 120 healthy females from 12 to 38 years of age in the active orthostatic test. The authors were the first to draw attention to the identity of the physiological mechanisms of postural reactions of blood circulation and the well-known Bezold's triad. Reflexes from tissue receptors are a powerful regulator of central and peripheral arterial and venous circulation and take part in man's daily life. The dynamics of changes in arterial and venous tonus, the height, age, and motor regimen of the individual must be taken into account in analysis of the orthostatic reactions. The rate of changes in the parameters of blood circulation in clinostatism may serve as the basis for gradual evaluation of orthostatic stability.
authors.forename: T F
authors.initials: TF
authors.lastname: Kostina
authors.forename: D L
authors.initials: DL
authors.lastname: Dligach
mesh_terms: D000293:Adolescent; D000328:Adult; D000375:Aging / Q000502:physiology*; D001775:Blood Circulation / Q000502:physiology*; D001794:Blood Pressure / Q000502:physiology; D005260:Female; D006112:Gravitation; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D011187:Posture / Q000502:physiology; D012016:Reference Values; D015656:Respiratory Mechanics / Q000502:physiology; D012769:Shock / Q000209:etiology / Q000503:physiopathology*
vernacular_title: O vliianii vozrasta na antigravitatsionnye reaktsii krovoobrashcheniia i vozniknovenie prekollaptoidnykh sostoianiĭ.