Laryngeal Muscles Flashcards
Name muscle A.
Arytenoid muscle
Name muscle B.
Lateral crico-arytenoid muscle
Name muscle C.
Cricothyroid muscle
Name muscle D.
Posterior crico-arytenoid muscle.
Describe the origin of the arytenoid muscle.
Inner surface of thyroid cartilage
Describe the insertion of the arytenoid muscle.
Arytenoid cartilage
Describe the action of the arytenoid muscle.
Shortens and adducts vocal ligament;
Widens laryngeal inlet
Describe the innervation of the arytenoid muscle.
Recurrent laryngeal nerve
Describe the blood supply of the arytenoid muscle.
Superior and inferior thyroid arteries
Describe the origin of the lateral cricoarytenoid muscle.
Superior margin of cricoid arch
Describe the insertion of the lateral cricoarytenoid muscle.
Muscular process of arytenoid cartilage
Describe the action of the lateral cricoarytenoid muscle.
Adducts vocal folds.
Describe the innervation of the lateral cricoarytenoid muscle.
Recurrent laryngeal nerve
Describe the blood supply of the lateral cricoarytenoid muscle.
Superior and inferior thyroid arteries
Describe the origin of the cricothyroid muscle.
Cricoid arch of cricoid cartilage
Decribe the insertion of the cricothyroid muscle.
Inferior horn of thyroid cartilage;
Inferior border of thyroid lamina
Describe the action of the cricothyroid muscle.
Lengthens and alters tension of vocal folds.
Describe the innervation of the cricothyroid muscle.
External branch of superior laryngeal nerve
Describe the blood supply of the cricothyroid muscle.
Cricothyroid branch of superior thyroid artery
Describe the origin of the posterior cricoarytenoid muscle.
Cricoid lamina of cricoid cartilage.
Describe the insertion of the posterior cricoarytenoid muscle.
Muscular process of arytenoid cartilage
Describe the action of the posterior cricoarytenoid muscle.
Abducts vocal chords
Describe the innervation of the posterior cricoarytenoid muscle.
Recurrent laryngeal nerve
Describe the blood supply of the posterior cricoarytenoid muscle.
Superior and inferior thyroid arteries
