Effect of experimental jaw muscle pain on EMG activity and bite force distribution at different level of clenching

2013 ◽  
Vol 40 (11) ◽  
pp. 826-833 ◽  
Author(s):  
A. Shimada ◽  
S. Hara ◽  
P. Svensson
Keyword(s):  
Muscle Pain ◽  
Bite Force ◽  
Emg Activity ◽  
Force Distribution ◽  
Jaw Muscle

Effect of experimental jaw muscle pain on bite force during mastication

2012 ◽  
Vol 3 (3) ◽  
pp. 190-191
Author(s):  
A. Shimada ◽  
L. Baad-Hansen ◽  
P. Svensson
Keyword(s):  
Muscle Pain ◽  
Masseter Muscle ◽  
Temporomandibular Disorder ◽  
Isotonic Saline ◽  
Posterior Part ◽  
Experimental Pain ◽  
Force Sensor ◽  
Bite Force ◽  
Emg Activity ◽  
Force Signal

AbstractBackground/aimsMuscular pain often impairs masticatory function in Temporomandibular disorder patients. The specific aim of this study was to investigate how the bite force during mastication is influenced by experimental muscle pain caused by infusion of glutamate into the masseter muscle.Methods12 healthy adults participated, after providing informed consent. Customized metal frames of the intraoral bite force sensor were manufactured for all subjects, and placed on their preferred chewing side. To induce experimental pain, a sterile solution of glutamate (0.5 M) was infused into the posterior part of the masseter muscle. Isotonic saline (0.9%) was infused as a control (randomized, cross-over design). During chewing three different kinds of test food (two different size carrots and gummy), bite force, electromyographic (EMG) activity of bilateral masseter muscle and anterior temporalis muscle were recorded. The first and last five masticatory cycles were used for analyses. The outcome parameters were as follows; Visual Analog Scale (VAS) for pain, impulse and duration from the bite force signal, duration and amplitude of EMG. Three-way ANOVAs with food (3 levels), sessions (5 levels: baseline, during glutamate, baseline 2, during isotonic saline, follow-up), cycles (2 × 5 levels) were carried out.ResultsGlutamate caused moderate levels of pain (mean VAS: 2.4 ± 0.9) whereas isotonic saline only caused low levels of pain (Mean VAS: 0.7 ± 0.5). The ANOVA of impulse data, as well as most EMG data, demonstrated a significant effect of session. Post hoc tests showed significantly higher impulse values of both the first and last five cycles in the glutamate session compared to baseline whereas the EMG activity was significantly decreased (P < 0.05).ConclusionSurprisingly, experimental pain induced by glutamate increased the bite force during mastication coupled with a decrease in EMG activity. This indicates a major reorganization of the motor control during painful mastication.

Effect of experimental jaw muscle pain on dynamic bite force during mastication

2015 ◽  
Vol 60 (2) ◽  
pp. 256-266 ◽  
Author(s):  
A. Shimada ◽  
L. Baad-Hansen ◽  
P. Svensson
Keyword(s):  
Muscle Pain ◽  
Bite Force ◽  
Jaw Muscle

Short Communication Motor activity in sleep bruxism with concomitant jaw muscle pain. A retrospective pilot study

1997 ◽  
Vol 105 (1) ◽  
pp. 92-95 ◽  
Author(s):  
Gilles J. Lavigne ◽  
Pierre H. Rompré ◽  
Jacques Y. Montplaisir ◽  
Frank Lobbezoo
Keyword(s):  
Pilot Study ◽  
Motor Activity ◽  
Muscle Pain ◽  
Short Communication ◽  
Sleep Bruxism ◽  
Jaw Muscle

scholarly journals Maximum bite force and jaw muscle mass in Jungle and Carrion Crows

2012 ◽  
Vol 61 (1) ◽  
pp. 84-90 ◽  
Author(s):  
Naoki Kamata ◽  
Sayaka Endo ◽  
Shoei Sugita
Keyword(s):  
Muscle Mass ◽  
Bite Force ◽  
Jaw Muscle
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