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Physiological adaptation to space flightIn space, adaptive physiological changes have been observed in virtually all body systems, but how far these changes progress with time is not known. Their time course demonstrates variable patterns; some systems show evidence of gradual and progressive change. Biomedical postflight data have shown that a compensatory period of readaptation to one gravity is required after space flight, with longer intervals required for longer missions. Consistent readaptation trends include orthostatic intolerance and neurovestibular difficulties. For the long-duration missions of the exploration era, it is critical to determine the extent to which deleterious changes (e.g., bone loss and possible immunological changes) can be reversed upon return to earth. Radiation protection is another critical enabling element for missions beyond low earth orbit. Radiation exposure guidelines have not been established for exploration missions. Currently our experience is insufficient to prescribe countermeasures for the stay times associated with a lunar base or a mission to Mars. Artificial gravity may provide a solution, but the level and duration of exposure necessary to prevent deconditioning must be determined. Central issues for medical care in remote settings are preventive, diagnostic, and therapeutic care and the minimization of risk.
Document ID
19910025543
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nicogossian, Arnauld E.
(NASA Headquarters Washington, DC United States)
Sulzman, Frank M.
(NASA Headquarters Washington, DC United States)
Gaiser, Karen K.
(NASA Headquarters Washington, DC United States)
Teeter, Ronald C.
(Lockheed Engineering and Sciences Co. Washington, DC, United States)
Date Acquired
August 14, 2013
Publication Date
September 1, 1990
Subject Category
Aerospace Medicine
Report/Patent Number
AIAA PAPER 90-3813
Accession Number
91A10166
Distribution Limits
Public
Copyright
Other

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