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Changes in recruitment of Rhesus soleus and gastrocnemius muscles following a 14 day spaceflightThe effect of microgravity on the recruitment patterns of the soleus, gastrocnemius, and tibialis-anterior muscles was investigated by comparing electromyograms (EMGs) of these muscles of Rhesus monkeys implanted with EMG electrodes, taken before and after a 14-day flight on board Cosmos 2044. It was found that the EMG amplitude values in the soleus muscle decreased after the spaceflight but returned to normal values over the 2-wk recovery period. The medial amplitudes of gastrocnemius and tibialis anterior were not changed by flight. Joint probability density distributions displayed changes after flight in both the soleus and gastrocnemius muscles, but not in tibialis anterior.
Document ID
19920056536
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hodgson, J. A.
(California, University Los Angeles, United States)
Bodine-Fowler, S. C.
(USVA, Medical Center San Diego, CA, United States)
Roy, R. R.
(NASA Ames Research Center Moffett Field, CA, United States)
De Leon, R. D.
(NASA Ames Research Center Moffett Field, CA, United States)
De Guzman, C. P.
(California, University Los Angeles, United States)
Koslovskaia, I.
(NASA Ames Research Center Moffett Field, CA, United States)
Sirota, M.
(Institute of Biomedical Problems Moscow, Russia)
Edgerton, V. R.
(California, University Los Angeles, United States)
Date Acquired
August 15, 2013
Publication Date
February 1, 1991
Publication Information
Publication: Physiologist, Supplement
Volume: 34
Issue: 1 Fe
ISSN: 0031-9376
Subject Category
Life Sciences (General)
Accession Number
92A39160
Funding Number(s)
CONTRACT_GRANT: NCC2-535
Distribution Limits
Public
Copyright
Other

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