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Bone mineral changes in the Apollo astronautsLoss of mineral from bone during periods of immobilization, recumbency or weightlessness have been observed. These losses are more apparent in the lower extremity than the upper and have been observed to exceed 30% in the case of the central os calcis during 36 weeks of bedrest. In early Gemini studies using X-ray densitometry, large losses of bone mineral were observed in the radius and ulna. This observation was not validated in the Apollo 14, 15 and 16 crewmen when a more precise technique, gamma ray absorptiometry, was used. The large losses reported for the early Gemini missions were not seen when this new measuring technique was employed.
Document ID
19750003587
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Vogel, J. M.
(California Univ. Davis, CA, United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1974
Publication Information
Publication: HEW Intern. Conf. on Bone Mineral Meas.
Subject Category
Aerospace Medicine
Accession Number
75N11659
Funding Number(s)
CONTRACT_GRANT: NASA ORDER T-93591
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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