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在61只尸体喉解剖和测量的基础上,对环甲关节运动进行了力学分析。环状软骨绕贯穿两侧环甲关节的冠状轴在矢状面上转动,能使两侧声带同时伸缩3.41mm左右;沿甲状软骨环关节面长径方向滑动,能使一侧声带伸长而另一侧声带缩短,二者之差可达2.42mm左右。上述“转动”能有效地调节声带的张弛,“滑动”能均衡两侧声带张力,由于“滑动”运动要比“转动”运动费力得多,因而关节病变时易引起滑动受限。环甲关节水平向异常滑动或单侧滑动受限可导致声门偏斜。
On the basis of 61 cadaveric laryngeal dissections and measurements, mechanics analysis of cricomotion was carried out. Cricoid around the coronal axis of the ring around both sides of the metatarsal rotation in the sagittal plane, enabling simultaneous expansion and contraction of both vocal cords about 3.41mm; along the long axis of the thyroid cartilage ring face sliding direction, can make one side of the vocal cords and another elongated Side of the vocal cords shorten the difference between the two up to 2.42mm or so. The above “rotation” can effectively adjust the relaxation of the vocal cords. “Sliding” can equalize the tension of the vocal cords on both sides. As the “sliding” movement is more laborious than the “rotation” movement, the slippage of the joint is apt to be caused when the joint is slipped. Hypothyroidism caused by abnormal horizontal or unilateral sliding of the cricothyroid joint.