X Vagus: Larynx Flashcards
Laryngeal inlet
Joins the pharynx to the larynx
Arytenoid cartilages attachment
Vocal cords
Cuneiform and corniculate function
Give firmness to rings of mucosa
Extrinsic ligaments of the larynx
Thyrohyoid ligament
Cricotracheal ligament
Hyoepiglottic ligament
Thyroepiglottic ligament has what membrane on the sides
Quadrangular membrane
Free margins on the sides of quadrangular membrane
Vestibular folds
In depressions, vestibular folds attach to
Vestibular fossa
Crycothyroid ligament is under what ligament
Vocal ligament
Vocal ligament is…
The core of vocal cord
From top to bottom: vocal, vestibular, crycothyroid lig.
Vestibular
Vocal
Cricothyroid
Rima under rima vestibulis
Rima glotidis
Length of rima vestibulis
From one vestibular fold to the other
Function of extrinsic muscles
Move larynx as a whole
Function of intrinsic muscles
Move vocal cords
Function of crycothyroid ligament
Move crycothyroid joint and stretch the vocal cords
Function of posterior cricoarytenoid muscle
Abduction of vocal cords –> opening
Function of lateral cricoarytenoid muscle
Adduction of vocal cords –> closure
Transverse arytenoid muscle function
Adduction –> closure
Muscles modifying the diameter of laryngeal inlet
Oblique arytenoid
Aryepiglottic
Thyroepiglottic
During forced inspiration
Abduction of vocal cords
Rima glotidis opened
Vestibule opened
Phonation
Adduction of vocal cords
Vestibule opened
Swallowing
Adduction
Rima glotidis closed
Vestibular folds closed
Innervation of intrinsic muscles of larynx
Recurrent laryngeal nerve
Superior laryngeal nerve
Of X vagus nerve
Superior laryngeal nerve branches into
Internal
External
Internal laryngeal nerve innervates
Thyrohyoid membrane to gather information about the mucosa
External laryngeal nerve innervates
Cricothyroid muscle, its a motor nerve
Recurrent laryngeal nerve innervates
The rest of intrinsic muscles
Therefore all except thyrohyoid membrane and crycothyroid muscle
Piriform recess origin
At the end of the pharynx
Vascularization of larynx
External carotid artery –> superior thyroid artery –> superior laryngeal artery
Origin of inferior thyroid artery
Thyrocervical trunk
Do inferior and superior thyroid arteries anastomose
Yes
Venous drainage
Superior laryngeal vein –> internal jugular vein
Inferior laryngeal vein –> bracho-pharyngeal vein
