Journal of Applied Physiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 72: 1940-1944, 1992;
8750-7587/92 $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 Whitelaw, W. A.
Right arrow Articles by De Troyer, A.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Whitelaw, W. A.
Right arrow Articles by De Troyer, A.

Journal of Applied Physiology, Vol 72, Issue 5 1940-1944, Copyright © 1992 by American Physiological Society

ARTICLES

Intercostal muscles are used during rotation of the thorax in humans

W. A. Whitelaw, G. T. Ford, K. P. Rimmer and A. De Troyer
Department of Respiratory Medicine, Faculty of Medicine, University of Calgary, Alberta, Canada.

To test the idea that the lateral intercostal muscles may be more suited to aid in rotational than respiratory movements of the thorax, we inserted bipolar fine-wire electrodes in external and internal intercostal muscles in the right midaxillary line in nine sitting subjects and examined the pattern of contraction of these muscles during voluntary axial rotations of the thorax (30-35 degrees), resting breathing, and CO2-induced hyperpnea. The right external intercostal muscles were strongly recruited in rotations to the left but were not active in rotations to the right. In contrast, the right internal intercostal muscles were active in rotations to the right but not in rotations to the left. Rotations completed in 1 or 2 s were associated with an early burst of electromyographic activity, followed by a low plateau that persisted while the rotation was held. Rotations made very gradually over 5-10 s were associated with gradually rising electromyographic activity. The amplitude of activity recorded during 30-35 degrees rotations was equivalent to that measured when minute ventilation was increased by CO2 to 50 l/min. We conclude that the lateral intercostal muscles have a major role in producing axial rotations of the thorax.


This article has been cited by other articles:


Home page
 J. Physiol.Home page
S. C. Gandevia, A. L. Hudson, R. B. Gorman, J. E. Butler, and A. De Troyer
Spatial distribution of inspiratory drive to the parasternal intercostal muscles in humans
J. Physiol., May 15, 2006; 573(1): 263 - 275.
[Abstract] [Full Text] [PDF]

Home page
 J Bone Joint Surg BrHome page
P. Chalidapong, K. Sananpanich, and J. Klaphajone
Electromyographic comparison of various exercises to improve elbow flexion following intercostal nerve transfer
J Bone Joint Surg Br, May 1, 2006; 88-B(5): 620 - 622.
[Abstract] [Full Text] [PDF]

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