Nasri S, Sercarz J A, Azizzadeh B, Kreiman J, Berke G S
Division of Head and Neck Surgery, UCLA School of Medicine.
Laryngoscope. 1994 Oct;104(10):1213-8.
In this experiment, the adductory properties of three intrinsic laryngeal muscles (the thyroarytenoid [TA], lateral cricoarytenoid [LCA], and interarytenoid [IA]) were studied and quantified. Using an in vivo canine laryngeal model, a recently developed "tensionometer" was used to measure the adductory force produced by each of these muscles at the vocal process of the arytenoid. Isolated muscle activation was obtained by stimulating selective terminal branches of the anterior division of the recurrent laryngeal nerve. Results indicate that the LCA is the strongest adductory muscle, followed by the TA and the IA. Videolaryngoscopy revealed that LCA contraction causes adduction of the vocal fold and vocal process, with the predominant effect on the process. TA stimulation leads primarily to adduction of vocal fold, and the IA adducts mainly the vocal process. Implications of these findings are discussed.
在本实验中，对三块喉内肌（甲杓肌[TA]、环杓侧肌[LCA]和杓间肌[IA]）的内收特性进行了研究和量化。使用体内犬喉模型，采用一种最近开发的“张力计”来测量这些肌肉在杓状软骨声带突处产生的内收力。通过刺激喉返神经前支的选择性终末分支来实现孤立肌肉激活。结果表明，LCA是最强的内收肌，其次是TA和IA。电子喉镜检查显示，LCA收缩导致声带和声带突内收，对声带突的影响最为显著。TA刺激主要导致声带内收，而IA主要使声带突内收。讨论了这些发现的意义。
