LING 2P90 Lecture Notes - Lecture 13: Posterior Cricoarytenoid Muscle, Infrahyoid Muscles, Cricothyroid Muscle

• School: Brock University
• Department: Linguistics
• Course: LING 2P90
• Professor: Richard Welland

Document Summary

Ling 2p90: anatomy and physiology of speech production. Intrinsic muscles: both attachments inside larynx, control over phonation, abductors (open, tensors (length and tighten, relaxers (shorten, adductors (approximate) Extrinsic muscles: one attachment outside of the larynx, support larynx and hold in position. Cricothyroid muscle (ct: study tip: look at the name. We know that the attachments are the crico and the thyroid. Origin: upper border of arch of cricoid cartilage. Adducts vocal folds (especially important for medial compression of vocal folds) Oblique arytenoid muscle: originate at muscular process of one arytenoid cartilage & insert into apex of opposite cartilage (diagram would look like an x, contribute to medial compression of vocal folds. Transverse arytenoid muscle: originate at lateral margin of one arytenoid cartilage and insert into lateral margin of other. Thyrovocalis (vocalis: adjacent to the vocal ligament. Regulates longitudinal tension of vocal fold: alone, ta relaxes vocal folds, opposed, ta tenses vocal folds. Origin: at arch of the cricoid cartilage.