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


     

J Appl Physiol 56: 326-332, 1984;
8750-7587/84 $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
Right arrow Citation Map
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 De Troyer, A.
Right arrow Articles by Kelly, S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by De Troyer, A.
Right arrow Articles by Kelly, S.

Journal of Applied Physiology, Vol 56, Issue 2 326-332, Copyright © 1984 by American Physiological Society

ARTICLES

Action of neck accessory muscles on rib cage in dogs

A. De Troyer and S. Kelly

To investigate the action of the neck accessory muscles on the rib cage, we stimulated the sternocleidomastoid and the scalenus muscles separately in supine anesthetized dogs. Hooks screwed into the sternum and ribs were used to measure their axial displacements and the changes in anteroposterior (AP) and transverse (T) diameters of the rib cage. We found that the sternocleidomastoid and scalenus muscles, when they contract alone, cause a large axial displacement of the sternum and the ribs in a cephalad direction and expand the rib cage along both its AP and T diameters. Opening the abdomen increased the cephalad displacement of the ribs and the expansion of the lower rib cage, particularly along its T diameter, but reduced the increase in lung volume. These experiments indicate 1) that the action of the sternocleidomastoid and scalenus muscles on the rib cage is essentially the consequence of a rotation of the ribs' neck axes, resulting from the cephalad displacement of the ribs, and 2) that the fall in abdominal pressure, almost certainly by acting through the zone of apposition of the diaphragm to the rib cage, has a deflationary action on the lower rib cage, more markedly so on its lateral than its anterior wall. The experiments also suggest that the fall in abdominal pressure prevents the diaphragm from moving cephalad and aids the neck accessory muscles in inflating the lungs.


This article has been cited by other articles:


Home page
 Physiol. Rev.Home page
A. De Troyer, P. A. Kirkwood, and T. A. Wilson
Respiratory Action of the Intercostal Muscles
Physiol Rev, April 1, 2005; 85(2): 717 - 756.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
A. Legrand, E. Schneider, P.-A. Gevenois, and A. De Troyer
Respiratory effects of the scalene and sternomastoid muscles in humans
J Appl Physiol, April 1, 2003; 94(4): 1467 - 1472.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
M. Fournier and M. I. Lewis
Functional, cellular, and biochemical adaptations to elastase-induced emphysema in hamster medial scalene
J Appl Physiol, April 1, 2000; 88(4): 1327 - 1337.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
M. Cappello and A. de Troyer
Interaction between left and right intercostal muscles in airway pressure generation
J Appl Physiol, March 1, 2000; 88(3): 817 - 820.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
A. Legrand, T. A. Wilson, and A. De Troyer
Rib cage muscle interaction in airway pressure generation
J Appl Physiol, July 1, 1998; 85(1): 198 - 203.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
A. Legrand, V. Ninane, and A. De Troyer
Mechanical advantage of sternomastoid and scalene muscles in dogs
J Appl Physiol, May 1, 1997; 82(5): 1517 - 1522.
[Abstract] [Full Text] [PDF]


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