![]() ![]() Vocal fold extending from the arytenoid cartilage, enveloping the vocal process, and The closing muscles include the thyroarytenoid which is the body of the Modulate air flow ( Kuna, Insalaco and Woodson,ġ988). This is adapted from Figure 1 of Ludlow ( Ludlow,ĭuring expiration, muscles which close the vocal folds are partly active to Thyroid cartilage forward (oblique) and downwards (rectus) to lengthen the vocal fold. In the bottom 2 illustrations, the effects ofĬontraction of the rectus and oblique compartments of the cricothyroid muscle pull the Process forward and downwards during closing of the vocal folds due to the actions of theĪdductor TA, LCA and IA muscles and the trajectory of the vocal process upwards and In the top left diagram the motion of the vocal Location of the arytenoid cartilage with the muscular and vocal processes, the cricoidĬartilage and the thyroid cartilage. The thyroarytenoid, IA is the inter-arytenoid and the PCA is the posterior cricoarytenoid,Īs well as the rectus and the oblique compartments of the cricothyroid muscle. Schematic illustration of the laryngeal muscles, LCA is the lateral cricoarytenoid, TA is Results in a negative pressure between the folds sucking them into the midline and ( Zealear, Billante, Courey, et al., 2003) withīilateral paralysis of the posterior cricoarytenoid the inspiratory flow of the air It is constantly active with greater increases in toneĭuring inspiration for vocal fold opening ( Poletto, When it contracts it pulls the arytenoidīackwards and rocking the vocal process upward and laterally ( Figure 1). Is attached to the muscular process of the arytenoid cartilage and inserts on the middleĪnd lateral part of the posterior cricoid. ![]() Producing vocal fold opening in the larynx is the posterior cricoarytenoid ( Tully, Brancatisano, Loring, et al., 1991). The upper airway is dilated for inspiration ( Amis,īrancatisano and Tully, 1995) and relaxes on expiration. Stabilization during lifting by breath holding during exertion. Open to varying degrees for air exchange for respiration, closed for airway protectionĭuring swallowing ( Ekberg, 1982) or for chest ![]() Musculature is continuous throughout life as the vocal folds are constantly being held The larynx serves as a valve in the upper airway with multiple life supportingįunctions such as: maintaining opening of the vocal folds (previously referred to as vocalĬords) for air exchange for respiration and closing during swallowing to help preventĪspiration of food and liquid into the trachea and lungs. ![]()
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