Masticatory muscle sleep background electromyographic activity is elevated in myofascial temporomandibular disorder patients. Academic Article Article uri icon

Overview

MeSH

  • Case-Control Studies
  • Female
  • Humans
  • Middle Aged
  • Monitoring, Physiologic
  • Muscle Contraction
  • Pain Measurement
  • Self Report
  • Sleep, REM
  • Time Factors
  • Wakefulness

MeSH Major

  • Electromyography
  • Facial Pain
  • Masticatory Muscles
  • Signal Processing, Computer-Assisted
  • Sleep Bruxism
  • Temporomandibular Joint Disorders

abstract

  • Despite theoretical speculation and strong clinical belief, recent research using laboratory polysomnographic (PSG) recording has provided new evidence that frequency of sleep bruxism (SB) masseter muscle events, including grinding or clenching of the teeth during sleep, is not increased for women with chronic myofascial temporomandibular disorder (TMD). The current case-control study compares a large sample of women suffering from chronic myofascial TMD (n = 124) with a demographically matched control group without TMD (n = 46) on sleep background electromyography (EMG) during a laboratory PSG study. Background EMG activity was measured as EMG root mean square (RMS) from the right masseter muscle after lights out. Sleep background EMG activity was defined as EMG RMS remaining after activity attributable to SB, other orofacial activity, other oromotor activity and movement artefacts were removed. Results indicated that median background EMG during these non-SB event periods was significantly higher (P < 0·01) for women with myofascial TMD (median = 3·31 μV and mean = 4·98 μV) than for control women (median = 2·83 μV and mean = 3·88 μV) with median activity in 72% of cases exceeding control activity. Moreover, for TMD cases, background EMG was positively associated and SB event-related EMG was negatively associated with pain intensity ratings (0-10 numerical scale) on post-sleep waking. These data provide the foundation for a new focus on small, but persistent, elevations in sleep EMG activity over the course of the night as a mechanism of pain induction or maintenance. © 2013 John Wiley & Sons Ltd.

publication date

  • December 2013

has subject area

  • Case-Control Studies
  • Electromyography
  • Facial Pain
  • Female
  • Humans
  • Masticatory Muscles
  • Middle Aged
  • Monitoring, Physiologic
  • Muscle Contraction
  • Pain Measurement
  • Self Report
  • Signal Processing, Computer-Assisted
  • Sleep Bruxism
  • Sleep, REM
  • Temporomandibular Joint Disorders
  • Time Factors
  • Wakefulness

Research

keywords

  • Comparative Study
  • Journal Article

Identity

Language

  • eng

PubMed Central ID

  • PMC3889636

Digital Object Identifier (DOI)

  • 10.1111/joor.12112

PubMed ID

  • 24237356

Additional Document Info

start page

  • 883

end page

  • 891

volume

  • 40

number

  • 12