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- W2119377549 abstract "The mechanism responsible for the central baroreflex resetting with age are an area of limited knowledge. We previously demonstrated that in subjects aged above 50 the airway resistance did not change in response to baroreceptor activation, whereas in younger volunteers the airway resistance significantly decreased.The aim of the present study was to evaluate the effect of carotid baroreceptor inactivation on the reflex change of respiratory resistance, in the course of aging.80 healthy men, divided in four groups: aged 20-30 (Group I), 31-40 (Group II), 41-50 (Group III), and 51-60 (Group IV) were included in the study. The selective inactivation of carotid baroreceptors was induced by generating a positive pressure of 40 mmHg for 5 s in two capsules placed bilaterally on the neck over the bifurcation of the carotid arteries. The oscillatory method (Siregnost FD5, Siemens) was used to measure continuously respiratory resistance.Inactivation of carotid baroreceptors produced a short increase in respiratory resistance by 0.38 +/- 0.01SE mbar/l/s, i.e., 21.7% above the resting level in Group I and by 0.25 +/- 0.01 mbar/l/s in Group II. In the two older groups (III and IV) respiratory resistance did not change in response to baroreceptors inactivation.In humans aged above 40, carotid baroreceptors do not contribute to bronchodilator tone, which causes imbalance between the activities of upper airway and chest wall inspiratory muscles leading to a collapsing effect on the upper airway." @default.
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- W2119377549 date "2009-12-01" @default.
- W2119377549 modified "2023-09-26" @default.
- W2119377549 title "Impairment of the baroreflex control of human respiratory resistance with age" @default.
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- W2119377549 doi "https://doi.org/10.1186/2047-783x-14-s4-241" @default.
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