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


     

J Appl Physiol 89: 967-976, 2000;
8750-7587/00 $5.00
This Article
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
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 Web of Science
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 Web of Science (45)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Hodges, P. W.
Right arrow Articles by Gandevia, S. C.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Hodges, P. W.
Right arrow Articles by Gandevia, S. C.
Vol. 89, Issue 3, 967-976, September 2000

Changes in intra-abdominal pressure during postural and respiratory activation of the human diaphragm

Paul W. Hodges and Simon C. Gandevia

Prince of Wales Medical Research Institute, University of New South Wales, Sydney, New South Wales 2031, Australia

In humans, when the stability of the trunk is challenged in a controlled manner by repetitive movement of a limb, activity of the diaphragm becomes tonic but is also modulated at the frequency of limb movement. In addition, the tonic activity is modulated by respiration. This study investigated the mechanical output of these components of diaphragm activity. Recordings were made of costal diaphragm, abdominal, and erector spinae muscle electromyographic activity; intra-abdominal, intrathoracic, and transdiaphragmatic pressures; and motion of the rib cage, abdomen, and arm. During limb movement the diaphragm and transversus abdominis were tonically active with added phasic modulation at the frequencies of both respiration and limb movement. Activity of the other trunk muscles was not modulated by respiration. Intra-abdominal pressure was increased during the period of limb movement in proportion to the reactive forces from the movement. These results show that coactivation of the diaphragm and abdominal muscles causes a sustained increase in intra-abdominal pressure, whereas inspiration and expiration are controlled by opposing activity of the diaphragm and abdominal muscles to vary the shape of the pressurized abdominal cavity.

postural control; abdominal muscles; spinal stability


This article has been cited by other articles:


Home page
 J. Exp. Biol.Home page
S. M. Deban and D. R. Carrier
Hypaxial muscle activity during running and breathing in dogs
J. Exp. Biol., July 1, 2002; 205(13): 1953 - 1967.
[Abstract] [Full Text] [PDF]

Home page
 Eur Respir JHome page
S. Abdel Kafi, T. Serste, D. Leduc, R. Sergysels, and V. Ninane
Expiratory flow limitation during exercise in COPD: detection by manual compression of the abdominal wall
Eur. Respir. J., May 1, 2002; 19(5): 919 - 927.
[Abstract] [Full Text] [PDF]

Home page
 J. Physiol.Home page
P. W Hodges, I. Heijnen, and S. C Gandevia
Postural activity of the diaphragm is reduced in humans when respiratory demand increases
J. Physiol., December 15, 2001; 537(3): 999 - 1008.
[Abstract] [Full Text] [PDF]


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