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Spaceflight and growth effects on muscle fibers in the rhesus monkeyThe effect of a 14-day spaceflight onboard Cosmos 2044 on selected morphological and metabolic properties of single muscle fibers was investigated in a nonhuman primate, Macaca mulatta. It is concluded that the 14-day spaceflight had little impact on fiber size in the soleus (S) and medial gastrocnemius (MG) muscles, whereas it appeared to be a slight decrease in sized in the tibialis anterior (TA). The mean fiber size in the postflight biopsies increased relative to preflight values. The mean fiber succinate dehydrogenase activity was found to decrease in the MG, whereas there was no apparent effect of spaceflight on the s and ta muscles. The differences in response of the S, MG, and TA to spaceflight in monkeys vs rats may be related to a species responsiveness to spaceflight, the manner in which the animals were restrained, and/or the possibility that the ankle musculature was able to function against a load while in space.
Document ID
19920068858
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bodine-Fowler, Sue C.
(NASA Ames Research Center Moffett Field, CA, United States)
Roy, Roland R.
(NASA Ames Research Center Moffett Field, CA, United States)
Rudolph, William
(NASA Ames Research Center Moffett Field, CA, United States)
Haque, Naz
(NASA Ames Research Center Moffett Field, CA, United States)
Kozlovskaia, Inessa B.
(NASA Ames Research Center Moffett Field, CA, United States)
Edgerton, V. R.
(California, University La Jolla and Los Angeles; Institute of Biomedical Problems, Moscow, Russia)
Date Acquired
August 15, 2013
Publication Date
August 1, 1992
Publication Information
Publication: Journal of Applied Physiology, Supplement
Volume: 73
Issue: 2 Au
ISSN: 8750-7587
Subject Category
Life Sciences (General)
Accession Number
92A51482
Funding Number(s)
CONTRACT_GRANT: NCC2-535
Distribution Limits
Public
Copyright
Other

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