Gastric myoelectric activity during low frequency oscillation
Gastric myoelectric activity during low frequency oscillation
BACKGROUND:
The normal 3 cycles per minute (3 c/m) resting activity of the stomach has been reported to shift into the range of 4-9 c/m (tachyarrhythmia) in subjects with symptoms of motion sickness. Previous studies have provoked motion sickness with an optokinetic stimulus and have not normally reported changes relative to a control condition. The present experiment investigated changes in the electrogastrogram (EGG) during a control condition and during exposure to 0.125 Hz off-axis yaw oscillation of the body.
METHODS:
There were 16 male subjects who participated in the two conditions 1 wk apart. The electrogastrogram, respiration rate and subjective ratings of sickness were monitored throughout both conditions. Spectral analysis of the EGG time histories provided measures of 3 c/m power and tachyarrhythmia power, which were also expressed as a percentages of EGG power over the total EGG frequency range (0.04 to 0.16 Hz.). The median frequency of the EGG over this bandwidth was also calculated.
RESULTS:
During motion exposure, the median frequency of the EGG and the percentage tachyarrhythmia power increased and the percentage 3 c/m power decreased relative to a pre-exposure baseline period and relative to the static control condition.
CONCLUSIONS:
Low frequency off-axis yaw oscillations disrupted the normal resting gastric myoelectric activity relative to a control condition.
420-425
Holmes, S.R.
30be62df-7670-48dd-ab3a-8d31811f52ef
Griffin, M.J.
177c1940-086f-4486-aad2-36e4a6ab9499
2000
Holmes, S.R.
30be62df-7670-48dd-ab3a-8d31811f52ef
Griffin, M.J.
177c1940-086f-4486-aad2-36e4a6ab9499
Holmes, S.R. and Griffin, M.J.
(2000)
Gastric myoelectric activity during low frequency oscillation.
Aviation, Space and Environmental Medicine, 71 (4), .
Abstract
BACKGROUND:
The normal 3 cycles per minute (3 c/m) resting activity of the stomach has been reported to shift into the range of 4-9 c/m (tachyarrhythmia) in subjects with symptoms of motion sickness. Previous studies have provoked motion sickness with an optokinetic stimulus and have not normally reported changes relative to a control condition. The present experiment investigated changes in the electrogastrogram (EGG) during a control condition and during exposure to 0.125 Hz off-axis yaw oscillation of the body.
METHODS:
There were 16 male subjects who participated in the two conditions 1 wk apart. The electrogastrogram, respiration rate and subjective ratings of sickness were monitored throughout both conditions. Spectral analysis of the EGG time histories provided measures of 3 c/m power and tachyarrhythmia power, which were also expressed as a percentages of EGG power over the total EGG frequency range (0.04 to 0.16 Hz.). The median frequency of the EGG over this bandwidth was also calculated.
RESULTS:
During motion exposure, the median frequency of the EGG and the percentage tachyarrhythmia power increased and the percentage 3 c/m power decreased relative to a pre-exposure baseline period and relative to the static control condition.
CONCLUSIONS:
Low frequency off-axis yaw oscillations disrupted the normal resting gastric myoelectric activity relative to a control condition.
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Published date: 2000
Organisations:
Human Sciences Group
Identifiers
Local EPrints ID: 10459
URI: http://eprints.soton.ac.uk/id/eprint/10459
ISSN: 0095-6562
PURE UUID: 77640efc-38ce-4e7e-8562-95ecef7f035f
Catalogue record
Date deposited: 07 Feb 2006
Last modified: 08 Jan 2022 15:45
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Contributors
Author:
S.R. Holmes
Author:
M.J. Griffin
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