Interaction of the carotid baroreflex, the muscle chemoreflex and the cardiopulmonary baroreflex in man during exercise

The interaction of the muscle chemoreflex and the cardiopulmonary baroreflex with the carotid baroreflex in humans performing exercise was investigated in healthy subjects using specially designed exercise regimen and apparatus. Stimulation of the muscle chemoreflex was achieved by restricting blood...

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Bibliographic Details
Published inThe Physiologist Vol. 34; no. 1, Fe; pp. S118 - S120
Main Authors Eiken, O., Convertino, V. A., Doerr, D. F., Dudley, G. A., Morariu, G., Mekjavic, I. B.
Format Journal Article
LanguageEnglish
Published Legacy CDMS 01.02.1991
Subjects
Aerospace Medicine
Blood Circulation - physiology
Chemoreceptor Cells - physiology
Exercise - physiology
Humans
Lower Body Negative Pressure
Pressoreceptors - physiology
Reflex - physiology
Space life sciences
Weightlessness - adverse effects
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Summary:The interaction of the muscle chemoreflex and the cardiopulmonary baroreflex with the carotid baroreflex in humans performing exercise was investigated in healthy subjects using specially designed exercise regimen and apparatus. Stimulation of the muscle chemoreflex was achieved by restricting blood flow in the exercising muscles by means of applying a pressure of 50 mm Hg, whereas cardiopulmonary baroreceptors were unloaded by employing LBNP of -20 mm Hg. The carotid baroreceptors were unloaded and stimulated by neck-pressure maneuvers (Sprenkle et al., 1986). Results showed that the cardiodecelerating capacity of the carotid baroreflex remains active during exercise, and may even be sensitized by the chemoreflex-induced increase in arterial pressure; but it is not affected by the cardiopulmonary baroreceptor activity.
Bibliography:CDMS
Legacy CDMS
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0031-9376
1522-1202