The arytenoid muscle / ærɪˈtiːnɔɪd / or interarytenoid muscle is a composite intrinsic muscle of the larynx, consisting of a transverse part and an oblique part - the two parts may be considered as separate muscles: an unpaired transverse arytenoid muscle, and a bilaterally paired oblique arytenoid muscle. [1]

2023年10月30日 · Transverse arytenoid is an unpaired, intrinsic muscle of the larynx. It is found just superior to the cricoid cartilage, covering the posterior aspect of the arytenoid cartilages. The transverse arytenoid is an adductor of the vocal fold thus playing an important role in phonation.

Intrinsic laryngeal muscle investigations, especially those of the interarytenoid (IA) muscle, have been primarily teleologically based. We determined IA muscle anatomy and histochemical and immunohistochemical classification of extrafusal and intrafusal (muscle spindle) fibers in …

2023年10月30日 · Oblique arytenoid is a paired intrinsic laryngeal muscle. It is found on the anterior aspect of the larynx, cranial to the superior border of the cricoid cartilage. It is the more superficial of the arytenoid muscles, with the transverse arytenoid muscle lying underneath it.

2023年8月14日 · The interarytenoid muscle is the only unpaired intrinsic muscle of the larynx and consists of both transverse and oblique fibers. The transverse fibers insert on the posterior face of each arytenoid and run horizontally, while the oblique fibers attach to each arytenoid apex and run obliquely to attach to the posterior face on the opposite side.

InterArytenoid muscle (IA) The IA muscle holds the vocal cords in a closed position after the LCA muscles bring them together. The IA muscle from one side attaches with the IA muscle from the other side.

2024年7月17日 · The interarytenoid (transverse arytenoid) muscle works synergistically with the lateral cricoarytenoid to maintain glottic closure when the cords are adducted. This muscle originates from the medial aspect of the arytenoid cartilage and inserts onto the contralateral interarytenoid muscle.

2024年2月21日 · transverse arytenoid (or interarytenoid) muscle: consists of a mass of transverse fibers, which connects the posterior surfaces of the arytenoid cartilages together. vocalis muscle: originates at the lateral surface of the vocal process of the arytenoid cartilage; it inserts onto the ipsilateral vocal ligament. Actions of the intrinsic muscles

IA-only paresis refers to weakness or paralysis of the larynx’s interarytenoid (IA) muscle, an unpaired muscle spanning between the bodies of both arytenoid cartilages but with normal function of the other muscles in the larynx.

Hirano explains the control of the vocal folds by describing the function of the five major intrinsic laryngeal muscles‑‑the cricothyroid muscle, the vocalis muscle, the lateral and posterior cricoarytenoid muscles, and the interarytenoid muscle.