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Short-duration spaceflight impairs human carotid baroreceptor-cardiac reflex responsesThe effect of a spaceflight on the vagally mediated baroreceptor-cardiac reflex responses of humans were investigated by measuring the responses (provoked by neck pressure changes) in supine position and the heart rate and blood pressure in the supine and standing positions in 16 astronauts before and after 4- to 5-day long Space Shuttle missions. The results showed that exposures to spaceflight resulted in reduced baseline levels of the vagal-cardiac outflow and the vagally mediated responses to changes of the arterial baroreceptor input and that these changes contribute to postflight reductions of astronauts' ability to maintain standing arterial pressures.
Document ID
19920071925
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Fritsch, Janice M.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Charles, John B.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Bennett, Barbara S.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Jones, Michele M.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Eckberg, Dwain L.
(USVA, Medical Center; Virginia, Medical College, Richmond; NASA, Johnson Space Center; Krug Life Sciences, Houston TX, United States)
Date Acquired
August 15, 2013
Publication Date
August 1, 1992
Publication Information
Publication: Journal of Applied Physiology
Volume: 73
Issue: 2 Au
ISSN: 8750-7587
Subject Category
Lunar And Planetary Exploration
Accession Number
92A54549
Funding Number(s)
CONTRACT_GRANT: NAG2-408
CONTRACT_GRANT: NAS9-16038
CONTRACT_GRANT: NAS9-17720
Distribution Limits
Public
Copyright
Other

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