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Original Research

Open Access

Waking and Sleeping Temporalis EMG Levels in Tension-Type Headache Patients

  • Glenn T. Clark1,*,
  • ShiroSaka1
  • Robert Merrill1
  • Virginia F. Flack2
  • David McAtthtir3
  • Charles McCreaty4

1Diagnostic Sciences and Orofacial Pain, School of Dentistry, Center for the Health Sciences, University of California at Los Angeles, Los Angeles, California

2Department of Bio statistic s, School of Public Health, University of California Los Angeles, Los Angeles, California

3Department of Epidemiology, School of Public Health, University of California Los Angeles, Los Angeles, California

4Neuropsychiatrie Institute, Department of Biobehavioral Sciences, University of California Los Angeles, Los Angeles, California

DOI: 10.11607/jofph.11298 Vol.11,Issue 4,December 1997 pp.298-305

Published: 30 December 1997

*Corresponding Author(s): Glenn T. Clark E-mail: glennc@DENTnet.dent ucla.edu

Abstract

Temporalis muscle activity in tension-type headache subjects (n = 36) and in matched nonheadache controls (n = 36) was evaluated in this study. Subjects' cumulative temporalis muscle activity was recorded every 30 minutes for 3 days and night using an electromyographic recorder. Analysis of variance showed that neither the waking nor the sleeping overall muscle activity levels for these two groups were statistically different. When the waking EMG data were dichotomized into function and nonfunction activities, a significant difference was found between groups during jaw function (i.e., chewing and talking). These data suggest that headache subjects are using their temporalis muscles with less efficiency than nonheadache subjects during function. This elevated EMG is more likely a consequence of pain (via protective splinting or guarding) rather than a cause in tension-type headache sufferers.

Keywords

tension-type headache; ambulatory and sleeping EMG; temporalis region

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Glenn T. Clark,ShiroSaka,Robert Merrill,Virginia F. Flack,David McAtthtir,Charles McCreaty. Waking and Sleeping Temporalis EMG Levels in Tension-Type Headache Patients. Journal of Oral & Facial Pain and Headache. 1997. 11(4);298-305.

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