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Adaptations to unilateral lower limb suspension in humansThe effect of unilateral lower limb suspension (ULLS) on neuromuscular function in humans is analyzed. All ambulatory activity on crutches was performed by eight subjects for 6 weeks who wear a shoe with a 10 cm sole on the right foot to unweight the left lower limb. Results show that average muscle cross sectional area (CSA) of the left knee extensor (KE) decreased 16 percent whereas the KE of the nonsuspended right limb showed no changes. Maximal integrated electromyography of vastus lateralis and overall mean power frequency of gastrocnemius medialis and soleus for submaximal isometric actions were both decreased post-ULLS. It is concluded that six weeks of ULLS induces adaptations in the neuromuscular system of humans which are comparable to those induced by bed rest and spaceflight.
Document ID
19920067660
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Dudley, Gary A.
(NASA John F. Kennedy Space Center Cocoa Beach, FL, United States)
Duvoisin, Marc R.
(NASA Kennedy Space Center Cocoa Beach, FL, United States)
Adams, Gregory R.
(Bionetics Corp., Biomedical and Environmental Laboratories; NASA, Kennedy Space Center Cocoa Beach, FL, United States)
Meyer, Ronald A.
(Michigan State University East Lansing, United States)
Belew, Anne H.
(Holmes Regional Medical Center Melbourne, FL, United States)
Buchanan, Paul
(NASA Kennedy Space Center Cocoa Beach, FL, United States)
Date Acquired
August 15, 2013
Publication Date
August 1, 1992
Publication Information
Publication: Aviation, Space, and Environmental Medicine
Volume: 63
Issue: 8 Au
ISSN: 0095-6562
Subject Category
Aerospace Medicine
Accession Number
92A50284
Funding Number(s)
CONTRACT_GRANT: NAS10-10285
CONTRACT_GRANT: NAS10-11624
Distribution Limits
Public
Copyright
Other

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