Effect of Sustained Human Centrifugation on Autonomic Cardiovascular and Vestibular Function [PDF]
, 2002 Repeated exposure to +Gz enhances human baroreflex responsiveness and improves tolerance to cardiovascular stress. However, both sustained exposure to +Gx and changes in otolith function resulting from the gravitational changes of space flight and ...
Benavides, Edgar W. +5 more
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High Intensity Exercise Countermeasures does not Prevent Orthostatic Intolerance Following Prolonged Bed Rest [PDF]
Approximately 20% of Space Shuttle astronauts became presyncopal during operational stand and 80deg headup tilt tests, and the prevalence of orthostatic intolerance increases after longer missions.
Lee, Stuart M. C. +3 more
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Physiological responses to prolonged bed rest in humans: A compendium of research, 1981-1988 [PDF]
Clinical observations and results form more basic studies that help to elucidate the physiological mechanisms of the adaptation of humans to prolonged bed rest. If the authors' abstract or summary was appropriate, it was included.
Barnes, Paul R. +3 more
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Psychophysiological Studies in Extreme Environments [PDF]
, 2011 This paper reviews the results from two studies that employed the methodology of multiple converging indicators (physiological measures, subjective self-reports and performance metrics) to examine individual differences in the ability of humans to adapt ...
Toscano, William B.
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Correlation of Space Shuttle Landing Performance with Post-Flight Cardiovascular Dysfunction [PDF]
Introduction: Microgravity induces cardiovascular adaptations resulting in orthostatic intolerance on re-exposure to normal gravity. Orthostasis could interfere with performance of complex tasks during the re-entry phase of Shuttle landings.
McCluskey, R.
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Gravitational Force and the Cardiovascular System [PDF]
Cardiovascular responses to changes in gravitational force are considered. Man is ideally suited to his 1-g environment. Although cardiovascular adjustments are required to accommodate to postural changes and exercise, these are fully accomplished for ...
Farhi, L. E. +3 more
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Pediatric postural orthostatic tachycardia syndrome: From mechanisms to individualized management
Pediatric DiscoveryPostural orthostatic tachycardia syndrome (POTS) represents chronic orthostatic intolerance. Patients usually suffer from presyncopal symptoms, such as lightheadedness, headache, blurred vision, and fatigue.
Wenrui Xu +3 more
doaj +1 more source
A model for plasma volume changes during short duration spaceflight [PDF]
It is well established that plasma volume decreases during spaceflight and simulated weightlessness (bedrest). The decrement in plasma volume is thought to contribute to the orthostatic intolerance that has been observed in some crew members following ...
Davis, John E.
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Cardiac reserve during weightlessness simulation and shuttle flight [PDF]
Bedrest deconditioning is suspected to reduce cardiac function. However, quantitation of subtle decreases in cardiac reserve may be difficult. Normal subjects show considerable variability in heart rate response, reflected by a relatively broadband ...
Goldberger, A. L.
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