Yardin M
J Biol Buccale. 1981 Jun;9(2):99-107.
The integrated electromyographic study allows to determine action of the variation amplitudes of tonic activity of the masseter muscles, the anterior temporalis muscles and the trapezius muscles induced by angular cephalic displacements of 10 degrees in the three space planes, in sitting position (P.A) and upright position (P.D.). The direction of the variations can be simultaneously positive or negative according to the vertical reference position (P.R.) in the different muscles studied. The masseter muscles showed the largest variations of the P.A. to the P.D. Twenty per cent of the subjects can be classified in a hypertonic category.
综合肌电图研究能够确定在坐位（P.A）和直立位（P.D）时，头在三个空间平面发生10度角位移所诱发的咬肌、颞前肌和斜方肌紧张性活动变化幅度的作用。根据所研究的不同肌肉中垂直参考位置（P.R.），变化方向可同时为正或为负。咬肌从P.A到P.D的变化最大。20%的受试者可被归类为高张力类别。
