Thyroarytenoid

Thyroarytenoid is a skeletal muscle that originates at inner surface of the thyroid cartilage (anterior aspect) Inserts to anterior surface of arytenoid cartilage, and is supplied by (artery, and nerve), and its actions include:recurrent laryngeal branch of the vagus thickens the vocal folds and decreases length; also helps to adduct the vocal folds during speech posterior part originates at posterior part of the cricoid Inserts to muscular process of the arytenoid cartilage, and is supplied by (artery, and nerve), and its actions include:recurrent laryngeal branch of the vagus abducts and laterally rotates the cartilage, pulling the vocal ligaments away from the midline and forward and so opening the rima glottidis lateral originates at lateral part of the arch of the cricoid Inserts to muscular process of the arytenoid cartilage, and is supplied by (artery, and nerve), and its actions include:recurrent laryngeal branch of the vagus adduct and medially rotate the cartilage, pulling the vocal ligaments towards the midline and backwards and so closing off the rima glottidis