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


     

J Appl Physiol 67: 2296-2302, 1989;
8750-7587/89 $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 van Lunteren, E.
Right arrow Articles by Cherniack, N. S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by van Lunteren, E.
Right arrow Articles by Cherniack, N. S.

Journal of Applied Physiology, Vol 67, Issue 6 2296-2302, Copyright © 1989 by American Physiological Society

ARTICLES

Effects of tracheal airway occlusion on hyoid muscle length and upper airway volume

E. van Lunteren, M. A. Haxhiu and N. S. Cherniack
Department of Medicine, Case Western Reserve University, Cleveland, Ohio.

Complex relationships exist among electromyograms (EMGs) of the upper airway muscles, respective changes in muscle length, and upper airway volume. To test the effects of preventing lung inflation on these relationships, recordings were made of EMGs and length changes of the geniohyoid (GH) and sternohyoid (SH) muscles as well as of tidal changes in upper airway volume in eight anesthetized cats. During resting breathing, tracheal airway occlusion tended to increase the inspiratory lengthening of GH and SH. In response to progressive hypercapnia, the GH eventually shortened during inspiration in all animals; the extent of muscle shortening was minimally augmented by airway occlusion despite substantial increases in EMGs. SH lengthened during inspiration in six of eight animals under hypercapnic conditions, and in these cats lengthening was greater during airway occlusion even though EMGs increased. Despite the above effects on SH and GH length, upper airway tidal volume was increased significantly by tracheal occlusion under hypercapnic conditions. These data suggest that the thoracic and upper airway muscle reflex effects of preventing lung inflation during inspiration act antagonistically on hyoid muscle length, but, because of the mechanical arrangement of the hyoid muscles relative to the airway and thorax, they act agonistically to augment tidal changes in upper airway volume. The augmentation of upper airway tidal volume may occur in part as a result of the effects of thoracic movements being passively transmitted through the hyoid muscles.


This article has been cited by other articles:


Home page
 J. Appl. Physiol.Home page
A. Oliven and M. Odeh
Effect of positional changes of anatomic structures on upper airway dilating muscle shortening during electro- and chemostimulation
J Appl Physiol, September 1, 2006; 101(3): 745 - 751.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
E. F. Bailey and R. F. Fregosi
Modulation of upper airway muscle activities by bronchopulmonary afferents
J Appl Physiol, August 1, 2006; 101(2): 609 - 617.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
M. Yokoba, H. G. Hawes, and P. A. Easton
Geniohyoid muscle function in awake canines
J Appl Physiol, August 1, 2003; 95(2): 810 - 817.
[Abstract] [Full Text] [PDF]


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