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


     

J Appl Physiol 59: 295-304, 1985;
8750-7587/85 $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 Mortola, J. P.
Right arrow Articles by Weeks, S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Mortola, J. P.
Right arrow Articles by Weeks, S.

Journal of Applied Physiology, Vol 59, Issue 2 295-304, Copyright © 1985 by American Physiological Society

ARTICLES

Mechanical aspects of chest wall distortion

J. P. Mortola, M. Saetta, G. Fox, B. Smith and S. Weeks

During passive inflation of the respiratory system, the rib cage (RC) expands because the pressure applied to it [approximately equal to abdominal pressure (Pab)] increases. Similar Pab-tidal volume (VT) relationships between passive and spontaneous inspirations would occur only if 1) Pab acts on RC equally in the two situations (no distortion) or 2) the extradiaphragmatic inspiratory muscles expand RC, compensating for distortion. In anesthetized adult rats and in sleeping human infants the passive relationships between VT and Pab or abdomen motion (AB) were constructed by occluding the airways during expiration. For a given Pab (or AB) in active breathing VT averaged 55% (rats) and 49% (infants) of the passive volume change. With phrenic stimulation in rats VT was only slightly less than during spontaneous breathing, indicating that, in the latter case, the respiratory system was essentially driven only by the diaphragm. In both species occasional breaths with large RC expansion occurred, and VT was then equal to or larger than the passive volume at iso-Pab. We conclude that 1) RC distortion decreases VT to approximately half of the passive value and 2) being on the relaxation curve reflects "compensated" distortion and not absence of it.


This article has been cited by other articles:


Home page
 NeoReviewsHome page
J. Palmer, J. Allen, and O. Mayer
Tidal Breathing Analysis
NeoReviews, May 1, 2004; 5(5): e186 - e193.
[Full Text] [PDF]

Home page
 J. Exp. Biol.Home page
P. M. MacFarlane, P. B. Frappell, and J. P. Mortola
Mechanics of the respiratory system in the newborn tammar wallaby
J. Exp. Biol., February 15, 2002; 205(4): 533 - 538.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
A. Sanna, F. Bertoli, G. Misuri, F. Gigliotti, I. Iandelli, M. Mancini, R. Duranti, N. Ambrosino, and G. Scano
Chest wall kinematics and respiratory muscle action in walking healthy humans
J Appl Physiol, September 1, 1999; 87(3): 938 - 946.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
C. M. Kenyon, S. J. Cala, S. Yan, A. Aliverti, G. Scano, R. Duranti, A. Pedotti, and P. T. Macklem
Rib cage mechanics during quiet breathing and exercise in humans
J Appl Physiol, October 1, 1997; 83(4): 1242 - 1255.
[Abstract] [Full Text] [PDF]


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