Correlations between an autoregressive model coefficient of the electromyogram of human jaw-closing muscles and maximum clenching time at the intercuspal position.
During maximum clenching in the intercuspal position, surface electromyograms of both masseters and both anterior temporales in seven healthy subjects with intact natural dentitions were sampled to generate a four-order, autoregressive model of the myoelectrical signal. The correlation coefficients and the linear regression between the model coefficients and the clenching time were calculated. The first-order autoregressive coefficient had the greatest negative correlation on average. In this model the first-order coefficient relates to muscular fatigue and the slope of the regressive equation relates to the length of time the isometric contraction can be maintained.
Shi
C S
CS
Prosthodontic Department, Stomatological College, Fourth Military Medical University, Xian Shaanxi, P.R. China.
Hua
Z Y
ZY
D000328:Adult; D003766:Dental Occlusion; D004576:Electromyography / Q000706:statistics & numerical data*; D005221:Fatigue / Q000503:physiopathology; D005246:Feedback; D005260:Female; D005583:Fourier Analysis; D006801:Humans; D008297:Male; D008406:Masseter Muscle / Q000502:physiology*; D008954:Models, Biological; D009119:Muscle Contraction / Q000502:physiology*; D012044:Regression Analysis; D013703:Temporal Muscle / Q000502:physiology*; D013997:Time Factors