嚼肌二腹肌前腹在咀嚼周期中的肌电观测  

Electromyographic Monitoring of Masseter and Anterior Belly of Digastricus in Mastication Cycle

作　　者：王雨生[1] 刘文[1] 孟扬[1] 孙学敏 

机构地区：[1]天津医学院口腔系口腔解剖生理教研室

出　　处：《天津医药》1990年第12期736-738,共3页Tianjin Medical Journal

摘　　要：本文从嚼肌、二腹肌前腹在咀嚼周期的 EMG(肌电图)变化中,观测和分析了各时相的特点、划分标志、电位波幅及持继时间,发现开口相和咀嚼相的持继时间对周期的全程影响最大,闭合过程中嚼肌各施力阶段的电位波幅显示较高的相关性。两肌有相互拮抗及协调作用。In view of the electromyographic change of the m. masseter and anterior bellyof m. digastricus in the mastication cycle,the characteristics, differentiation points,amplitude of electric potential and duration were observed and analysed. Theelectric potential of the m. masseter was the highest in the food comminuting phaseand the lowest in the food keeping phase. It was just the opposite in the case ofthe anterior belly of m.digastricus. It was proved that the m.masseter and m.diga-stricus were the antagonistic muscles, when the mandible moved, both musclescoordinated.

关 键 词：嚼肌 二腹肌 咀嚼 肌电观测 

分 类 号：R333.1[医药卫生—人体生理学]