Effect of Exercise on Cerebral Circulation

The effect of supine physical exercise on cerebral blood flow (CBF) was measured in 30 normal subjects with the 133Xe inhalation technique. The CBF measurements were correlated to changes in Pco2, heart rate, and blood pressure, and to cardiac output and right atrial pressure in 10 of the subjects w...

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Bibliographic Details
Published in:Journal of Cerebral Blood Flow & Metabolism 1983-09, Vol.3 (3), p.287-290
Main Authors: Globus, Mordecai, Melamed, Eldad, Keren, Andre, Tzivoni, Dan, Granot, Chaim, Lavy, Sylvan, Stern, Shlomo
Format: Article
Language:English
Subjects:
Adult
Aged
Arteries
Biological and medical sciences
Blood Pressure
Capillary Resistance
Carbon Dioxide - blood
Cardiac Output
Cerebral circulation. Blood-brain barrier. Choroid plexus. Cerebrospinal fluid. Circumventricular organ. Meninges
Cerebrovascular Circulation
Fundamental and applied biological sciences. Psychology
Heart Rate
Humans
Middle Aged
Partial Pressure
Physical Exertion
Space life sciences
Vascular Resistance
Vertebrates: nervous system and sense organs
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Summary:The effect of supine physical exercise on cerebral blood flow (CBF) was measured in 30 normal subjects with the 133Xe inhalation technique. The CBF measurements were correlated to changes in Pco2, heart rate, and blood pressure, and to cardiac output and right atrial pressure in 10 of the subjects who underwent Swan-Ganz catheterization. No significant change was found in CBF during physical exercise, although a marked increase in cardiac output, blood pressure, and right atrial pressure and a mild decrease in PCO2 were found. Cerebrovascular resistance increased by 38%, in contrast to a decrease of 33% in the peripheral vascular resistance. The factors that affect the mechanism of cerebrovascular autoregulation during exercise are discussed.
ISSN:0271-678X
1559-7016
DOI:10.1038/jcbfm.1983.43