title: Correlations between an autoregressive model coefficient of the electromyogram of human jaw-closing muscles and maximum clenching time at the intercuspal position.
abstract: 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.
authors.affiliation: Prosthodontic Department, Stomatological College, Fourth Military Medical University, Xian Shaanxi, P.R. China.
authors.forename: C S
authors.initials: CS
authors.lastname: Shi
authors.forename: Z Y
authors.initials: ZY
authors.lastname: Hua
mesh_terms: 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