Nasri S, Beizai P, Sercarz J A, Kreiman J, Graves M C, Berke G S
Division of Head and Neck Surgery, UCLA School of Medicine 90024-1624.
Ann Otol Rhinol Laryngol. 1994 Dec;103(12):975-82. doi: 10.1177/000348949410301208.
The interarytenoid (IA) muscle has rarely been studied in the living larynx. In this work, the role of the IA muscle in phonation was studied in three dogs by means of an in vivo phonation model. The isolated action of the IA muscle was studied by sectioning and stimulating its nerve branch. As IA activity increased, subglottic pressure increased significantly until a plateau was reached. In the absence of superior laryngeal nerve stimulation, the fundamental frequency rose with increasing IA activity. In the presence of superior laryngeal nerve stimulation, however, no significant change in fundamental frequency was observed with increasing IA activity. Measurement of adductory force demonstrated that the IA muscle adducts primarily the posterior vocal fold. In this canine model, phonation was not possible without IA stimulation, owing to a large posterior glottic chink.
杓间肌（IA）在活体喉部中很少被研究。在这项研究中，通过体内发声模型，对三只狗的杓间肌在发声中的作用进行了研究。通过切断并刺激其神经分支来研究杓间肌的单独作用。随着杓间肌活动增加，声门下压力显著升高，直至达到平稳状态。在没有喉上神经刺激的情况下，基频随着杓间肌活动增加而升高。然而，在有喉上神经刺激的情况下，随着杓间肌活动增加，未观察到基频有显著变化。内收力测量表明，杓间肌主要使声带后部内收。在这个犬类模型中，由于声门后间隙较大，没有杓间肌刺激就无法发声。
