Home Subscription Services
 
   

 
Journal of Oral & Facial Pain and Headache
OFPH Home Page
About the Editor
Editorial Board
Accepted Manuscripts
Submit
Author Guidelines
Submission Form
Reprints / Articles
Permissions
Advertising
MEDLINE Search
 
 
 
 
 
FacebookTwitter
Quintessence Publishing: Journals: OFPH
Journal of Oral & Facial Pain and Headache

Edited by Barry J. Sessle, BDS, MDS, BSc, PhD, FRSC

Official Journal of the American Academy of Orofacial Pain,
the European, Asian, and Ibero-Latin Academies of Craniomandibular
Disorders, and the Australian Academy of Orofacial Pain

ISSN 2333-0384 (print) • ISSN 2333-0376 (online)

Publication:
Winter 1998
Volume 12 , Issue 1

Back
Share Abstract:

Muscle Pain Modulates Mastication: An Experimental Study in Humans

Svensson/Arendt-Nielsen/Houe

Pages: 7-16
PMID: 9656894

In this study, pain was induced in the masseter muscle by tonic infusion of hypertonic saline (5%) for up to 800 seconds in 12 healthy men. Subjects continuously scored the pain intensity on a 10-cm visual analogue scale. Mastication ipsilateral and contralateral to the infusion side was quantitatively assessed with the use of jaw-tracking and electromyograph recordings of jaw-closing muscles before, during, and after periods of constant muscle pain intensity. The maximum voluntary occlusal force (MVOF) during short static contractions also was monitor ed. Jaw movements and electromyographic data were divided into single masticatory cycles and analyzed on a cycle-by-cycle basis to account for intercycle variability. In all subjects, tonic infusion (mean VAS +- SE, 4.6 +- .3 cm). MVOF was significantly affected by muscle pain (P < .0005), with significantly lower MVOF during pain compared to prepain and postpain (P < .05). In a significant number of masticatory cycles, the averaged electromyograph activity of all jaw-closing muscles during their agonist function was decreased for both ipsilateral and contralateral painful mastication (P < .05). These electromyographic changes are probably a reflection of the natural bilateral recruitment pattern of jaw-closing muscles during mastication. Significant changes in jaw movements during painful mastication could not be detected with the present jaw-tracking device, but further studies with more accurate and sensitive devices are needed.

Full Text PDF File | Order Article

 

 
Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.
  © 2014 Quintessence Publishing Co Inc
 

Home | Subscription Services | Books | Journals | Multimedia | Events | Blog
Terms of Use | Privacy Policy | About Us | Contact Us | Advertising | Help | Sitemap | Catalog