Journal of Applied Physiology Fuel your research with LabChart
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 76: 1242-1246, 1994;
8750-7587/94 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Wilson, T. A.
Right arrow Articles by Liu, S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Wilson, T. A.
Right arrow Articles by Liu, S.

Journal of Applied Physiology, Vol 76, Issue 3 1242-1246, Copyright © 1994 by American Physiological Society

ARTICLES

Effect of acceleration on the chest wall

T. A. Wilson and S. Liu
Department of Aerospace Engineering and Mechanics, University of Minnesota, Minneapolis 55455.

The gravitational force on the rib cage has been found to be an expiratory force of approximately 8 cmH2O. The gravitational force on the abdomen is an inspiratory force of the same magnitude. Because the compliance of the rib cage is greater than the compliance of the abdomen, it follows that gravity has a net expiratory effect on lung volume and that upward accelerations augmenting the gravitational force would have an additional expiratory effect. This conclusion is contrary to observations that functional residual capacity increases during headward accelerations in centrifuges and during intervals of upward acceleration in airplanes. We report the results of two studies of the effects of accelerations that are smaller in magnitude and of shorter duration than those studied in centrifuges and airplanes. The first was an experimental study of the effect of acceleration in an elevator. In subjects who relaxed against an occluded airway, airway pressure increased during upward accelerations and decreased during downward accelerations. The second was the modeling and analysis of the effects of the accelerations that occur during walking. The analysis predicted an initial expiratory response to the acceleration spike that occurs during footfall. The prediction agreed with data in the literature on the respiratory effect of walking. In both of these studies upward accelerations had an expiratory effect.


This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
D. Bettinelli, C. Kays, O. Bailliart, A. Capderou, P. Techoueyres, J. L. Lachaud, P. Vaida, and G. Miserocchi
Effect of gravity on chest wall mechanics
J Appl Physiol, February 1, 2002; 92(2): 709 - 716.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
S. H. Loring, H.-T. Lee, and J. P. Butler
Respiratory effects of transient axial acceleration
J Appl Physiol, June 1, 2001; 90(6): 2141 - 2150.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online