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Changes in gastric myoelectric activity during space flightThe purpose of the present study was to examine postprandial myoelectric activity of the stomach and gastric activity associated with space motion sickness using electrogastrography. Three crewmembers participated in this investigation. Preflight, subjects exhibited normal postprandial responses to the ingestion of a meal. Inflight, crewmembers exhibited an abnormal decrease in the power of the normal gastric slow wave after eating on flight day 1, but had a normal postprandial response by flight day 3. Prior to and during episodes of nausea and vomiting, the electrical activity of the stomach became dysrhythmic with 60-80% of the spectral power in the bradygastric and tachygastric frequency ranges. These findings indicate that gastric motility may be decreased during the first few days of space flight. In addition, changes in the frequency of the gastric slow wave associated with space motion sickness symptoms are consistent with those reported for laboratory-induced motion sickness.
Document ID
20040088173
Acquisition Source
Johnson Space Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Harm, Deborah L.
(NASA Johnson Space Center Houston TX United States)
Sandoz, Gwenn R.
Stern, Robert M.
Date Acquired
August 21, 2013
Publication Date
August 1, 2002
Publication Information
Publication: Digestive diseases and sciences
Volume: 47
Issue: 8
ISSN: 0163-2116
Subject Category
Aerospace Medicine
Distribution Limits
Public
Copyright
Other
Keywords
STS Shuttle Project
short duration
NASA Center JSC
manned
Flight Experiment
NASA Discipline Neuroscience

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