These muscles act on the arytenoid cartilages at the posterior ends of the vocal cords and are innervated by the left and right recurrent laryngeal nerves.
12.
It has been suggested that this is because arytenoid adduction directly rotates the arytenoid cartilage and thus more actively medializes the posterior aspect of the vocal cord.
13.
When twanging, the opening of the epiglottic funnel is made smaller by bringing the arytenoid cartilages closer to the lower part of epiglottis ( the petiole ).
14.
The suture placed in the arytenoid adduction procedure mimics the action of the lateral cricoarytenoid muscle and pulls the vocal process of the arytenoid cartilage medially and inferiorly.
15.
The "'Cricoarytenoid ligament "'extends from the lamina of the cricoid cartilage to the medial surface of the base and muscular process of the arytenoid cartilage.
16.
When the air pressure in the trachea rises as a result of this closure, the folds are blown apart, while the vocal processes of the arytenoid cartilages remain in apposition.
17.
They are attached at the back ( side nearest the spinal cord ) to the " arytenoids cartilages ", and at the front ( side under the chin ) to the thyroid cartilage.
18.
It is the inlet to another cavity in the lateral wall of larynx, the laryngeal ventricle . The vestibular fold is formed by the vestibular ligament extending from the lateral walls of the epiglottis to the arytenoid cartilage covered with mucous membrane.
19.
It is normally subdivided into two parts : that between the arytenoid cartilages is called the intercartilaginous part ( or the intercartilaginous glottis, respiratory glottis, or interarytenoid space ), and that between the vocal folds the intermembranous part or glottis vocalis.
20.
However, the aperture of the arytenoid cartilages, and therefore the tension in the vocal cords, is one of degree between the end points of open and closed, and there are several intermediate situations utilized by various languages to make contrasting sounds.
