Kinesiology 3222A/B Lecture Notes - Lecture 10: Rima Glottidis, Trachea, Lateral Cricoarytenoid Muscle
28 Mar 2017
School
Department
Course
Professor
Document Summary
Nine cartilages: hyaline cartilage except epiglottis (elastic cartilage) Triggers cough reflex in case of wrong swallow. Cartilage fuses together and makes adam"s apple. Epiglottis - stem part attaches to inside of thyroid cartilage and folds over. Cricoid cartilage - full ring unlike thyroid cartilage. Anchors onto anterior rim of thyroid cartilage. During swallowing, larynx moves superiorly and epiglottis tips over to cover laryngeal opening. Thyroid cartilage attached to hyoid bone by thyrohyoid membrane. Cricotracheal ligament - connects cricoid cartilage to tracheal ring. Arytenoid cartilages - where vocal cords attach. Vocal ligaments (vocal folds: attach arytenoid cartilages to thyroid cartilage o. Vestibular folds: mucosal folds superior to vocal folds o. Protective role: no role in voice production. Vocal fold length and glottis opening regulated by intrinsic laryngeal muscles. Pitch changes with length and tension of vocal folds o o. Pitch higher with longer vocal cords, lower with shorter cords.
