NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Altered bone turnover during spaceflightModifications in calcium metabolism during spaceflight were studied, using parameters that reflect bone turnover. Bone formation rate, medullary area, bone length, bone density, pore size distribution, and differential bone cell number were evaluated in growing rate both immediately after and 25 days after orbital spaceflights aboard the Soviet biological satellites Cosmos 782 and 936. The primary effect of space flight on bone turnover was a reversible inhibition of bone formation at the periosteal surface. A simultaneous increase in the length of the periosteal arrest line suggests that bone formation ceased along corresponding portions of that surface. Possible reasons include increased secretion of glucocorticoids and mechanical unloading of the skeleton due to near-weightlessness, while starvation and immobilization are excluded as causes.
Document ID
19820057144
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Turner, R. T.
(Veterans Administration Hospital Tacoma, WA, United States)
Morey, E. R.
(Veterans Administration Hospital Tacoma, WA, United States)
Liu, C.
(Veterans Administration Hospital Tacoma, WA, United States)
Baylink, D. J.
(U.S. Veterans Administration Medical Center Tacoma, WA; NASA, Ames Research Center, Moffett Field, CA, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1982
Publication Information
Publication: p. S-73
Subject Category
Life Sciences (General)
Accession Number
82A40679
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available