lecture 4 - head & neck 4 Flashcards
What are the 2 folds formed by the quadrangular membrane?
Aryepiglottic fold, vestibular fold
What fold is formed by the cricothyroid membrane?
vocal fold
What is the name of the gap between the two vocal cords?
Rima glottidis
What is the space within the larynx above the vestibular folds?
Vestibule
What is the function of the cricothyroid muscle?
stretches and tenses vocal cords
What is the function of the thyro-arytenoid muscle?
relaxes vocal fold
What is the function of the lateral crico-arytenoid muscle?
adducts vocal fold (brings folds together)
What is the function of the transverse and oblique arytenoid muscles?
aid in adduction of the vocal cords
What is the function of the aryepiglottic muscle?
narrows entrance to larynx, preventing food from entering
What is the function of the posterior crico-arytenoid muscle?
abducts vocal folds
What is the nerve supply for the intrinsic muscles of the larynx?
Recurrent laryngeal nerve for all except cricothyroid (external laryngeal)
What is the nerve supply to the mucous lining of the larynx above the vocal cords?
Internal laryngeal nerve
What is the nerve supply to the mucous lining of the larynx below the vocal cords?
Recurrent laryngeal nerve
What cranial nerve branches into the laryngeal nerves?
Vagus nerve
Where does the left recurrent laryngeal nerve originate?
The thorax