LING 2P90 Lecture Notes - Arytenoid Cartilage, Arytenoid Muscle, Stylohyoid Muscle
24 Nov 2012
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Origin at upper border of arch of cricoid cartilage. Adducts vocal folds (especially important for medial compression of vocal folds) Originate at muscular process of one arytenoid cartilage and insert into apex of opposite cartilage. Contribute to medial compression of vocal folds. Originate at lateral margin of one arytenoid cartilage and insert into lateral margin of other. Pars oblique (inferior horn of thyroid cartilage) Decreases distance between angle of thyroid and arch of cricoid cartilage. Origin at posterior surface of cricoid lamina. Innervation-vagus nerve fig-extensiveness of the vagus nerve as it travels throughout the body. Anterior belly: inside surface of lower border of mandible toward lesser horn of hyoid bone. Posterior belly: mastoid process toward and deep to sternomastoid muscle. Elevates hyoid bone, floor of mouth, and tongue. Origin at inner surface of anterior mandible (mental symphysis) When mandible fixed, geniohyoids pull hyoid bone upward and forward. Posterior surface of sternum and 1st costal cartilage to thyroid lamina (oblique line)
