Exam 1 Part 7 Flashcards
T/F: Two adductors: LCA and IA; one abductor: PCA; two tensors: CT and TA (vocalis)
True
Function of the external superior laryngeal nerve (CN X)?
Motor function for cricothyroid,
Function of the internal superior laryngeal nerve (CN X)?
Superaglottis sensation
Function of the recurrent laryngeal nerve (CN X)?
Motor for all intrinsic laryngeal muscles except CT), subglottic sensation
The sensation of supraglottal regions is innervated by:
Internal branch of superior laryngeal nerve
The right recurrent laryngeal nerve makes a U-turn around:
Subclavian Artery
Internal fluid balance of larynx controlled by blood supply through branches of the ____
External carotid artery.
What are the 2 branches of the external carotid artery?
Superior thyroid artery, superior and inferior laryngeal arteries
A predominant amount of blood supply goes to what parts in the vocal fold?
intermediate and deep lamina propria, vocalis muscle
Why is there a limited supply of blood to the epithelium and the superficial lamina propria of the vocal folds?
They have the highest impact of shear forces of vocal fold motion and so high risk to hemorrhage
These muscles help the larynx for stability and also for the motion of entire larynx upwards and downwards.
Extrinsic laryngeal muscles
Muscles that act (functionally) to move the larynx up (superiorly)
Elevators
Moves hyoid posteriorly and superiorly (back and up)
Stylohyoid
What is the origin and insertion of the stylohyoid?
Styloid process of temporal bone, hyoid
Elevates hyoid/larynx, lowers mandible
Mylohyoid
