环甲肌和甲杓肌是驱使环甲关节运动的动力装置.通过对8只犬的活体实验,证实在该动力装置牵拉下,环状软骨可以发生位移和偏转,而甲状软骨则相对固定,在单侧环甲肌作用下,环状软骨可以发生偏转而引起声门偏斜,但不会引起喉扭转,只有在单侧咽下缩肌的作用下,喉扭转现象才会出现。 Cricothyroid muscle and the armor muscle is a driving force device for the movement of the cricothyroid.According to the in vivo experiments on eight dogs, it is confirmed that the cricoid cartilage can be displaced and deflected under the traction of the power plant, while the thyroid cartilage is relatively fixed. Cyclic cartilage can be deflected to cause glottis deflection, but will not cause laryngeal torsion, unilateral throat muscle under the action of the throat torsion phenomenon will appear.