We observed that contraction of posterior cricoarytenoid muscles cause arytenoid cartilages towards external rocking with external gliding along the cricoarytenoid faucets, leading to vocal processes turning up-posteriorly-externally, departing of bilateral arytenoid cartilages, opening the glottis.
环构后肌收缩使杓状软骨外翻跨动,同时沿环构关书面向外侧滑动,导致声带突向后、外、上方旋转,两侧杓状软骨相互远离,声门开大;
Contraction of lateral cricoarytenoid muscles cause arytenoid cartilages towards internal rocking, vocal processes to-ward turning down-anteriorly-medially, closing the intermembranous part of glottis.
环杓侧肌收缩使杓状软骨内翻跨动,声带突向前、内、下方旋转,膜间部声门闭合;
Objective: To assess the curative effects of the dislocation of cricoarytenoid joint caused by intubation, indirect laryngoscope ( IL) and direct laryngoscope ( DL) were utilized to the closed reduction of the displaced arytenoid under local anesthesia.
目的:探讨在局麻下经间接喉镜和直接喉镜杓状软骨拨动术对气管插管致环杓关节脱位的疗效。
Results Soft tissue injuries were detected in five cases including swelling of the aryepiglottic folds, the false or true vocal cords and airway narrowing in four, and left cricoarytenoid dislocation and card paralysis in one.
结果软组织损伤5例:杓会厌襞和真假声带肿胀、气道狭窄4例,左环杓关节脱位,声带麻痹1例;
Except the cricothyroid muscle, all the laryngeal intrinsic muscles are innervated by the anterior branch of the recurrent laryngeal nerve. In 88% of the cases, the posterior cricoarytenoid muscle is innervated by two nervous pedicle, the others are innervated by a single nervous pedicle.
喉内肌除环甲肌外,均由喉返神经前支支配,其中88%的环杓后肌为喉返神经前支发出单支支配;
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