Kinesiology 3222A/B Lecture Notes - Lecture 9: Hyaline Cartilage, Thyroid Cartilage, Elastic Cartilage

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 3222A/B
• Professor: Dan Belliveau

Document Summary

Larynx: voice box produces vocalization, connects laryngopharynx to trachea, allows air to enter trachea, keeps food out, point where respiratory and digestive tracts diverge. Located anterior to c3-c6 vertebrae: composed of many pieces of cartilage, more protection anteriorly. Laryngeal joints: act on vocal folds, two sets, cricoarytenoid joints, between cricoid and arytenoid cartilages, allow vocal folds to abduct and adduct, thyrocricoid joints, between thyroid and cricoid cartilages, allows vocal cords to lengthen. Cricoarytenoid joints: allow a pivoting motion of arytenoids on cricoid as well as medial/lateral. Thyrocricoid joints: allows thyroid to tilt on cricoid and lengthen vocal folds. Intrinsic larynx muscles: acts on vocal cords via cartilages, cricothyroid, tensor, transverse arytenoid, adductor, posterior cricoarytenoid, abductor. Laryngeal folds: two sets of ligaments are in the larynx, vocal cords/folds. Inferior: vibrate and produce sound when air passes over them, vestibular folds. "false cords: superior, nothing to do with sound production.