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Vestibulo-spinal reflex mechanismsThe specific objectives of experiments designed to investigate postural reflex behavior during sustained weightlessness are discussed. The first is to investigate, during prolonged weightlessness with Hoffmann response (H-reflex) measurement procedures, vestibulo-spinal reflexes associated with vestibular (otolith) responses evoked during an applied linear acceleration. This objective includes not only an evaluation of otolith-induced changes in a major postural muscle but also an investigation with this technique of the adaptive process of the vestibular system and spinal reflex mechanisms to this unique environment. The second objective is to relate space motion sickness to the results of this investigation. Finally, a return to the vestibulo-spinal and postural reflexes to normal values following the flight will be examined. The flight experiment involves activation of nerve tissue (tibial N) with electrical shock and the recording of resulting muscle activity (soleus) with surface electrodes. Soleus/spinal H-reflex testing procedures will be used in conjuction with linear acceleration through the subject's X-axis.
Document ID
19820010383
Acquisition Source
Legacy CDMS
Document Type
Other - Other
Authors
Reschke, M. F.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Date Acquired
August 10, 2013
Publication Date
November 1, 1981
Publication Information
Publication: NASA. Marshall Space Flight Center Spacelab Mission 1 Expt. Descriptions
Subject Category
Aerospace Medicine
Accession Number
82N18257
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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