W23-L8: Larynx and Laryngopharynx Flashcards
What is the upper and lower border of the Larynx?
Epiglottis above, C6/lower border of cricoid cartilage
What makes up the laryngeal skeleton?
Superior to inferior: Hyoid bone Hyoid-thyroid membrane Thyroid cartilage Thyroid-cricoid membrane Cricoid cartilage
Where do the vocal ligaments sit?
Inside the thyroid cartilage
Where does the cricoid cartilage articulate with the thyroid cartilage?
The inferior horn
What is the posterior wall of the thyroid?
Laryngeal Inlet
What attaches to the arytenoid cartilages?
vocal ligaments attach
to anterior processes of arytenoid cartilage, posterior is for
internal muscles of the larynx
Where does the epiglottis originate from?
posterior aspect of angle of the thyroid cartilage
How many vocal ligaments are there?
2
How many mucosal folds are there?
2, superior one is vestibular fold, inferior covers vocal ligament
For phonation and breathing where are the vocal ligaments?
Vocal ligaments need to be adducted for phonation, abducted for breathing
What muscles alter the position of vocal ligaments?
Intrinsic muscles of the larynx
What are the two main nerves that supply the larynx?
Superior laryngeal (splits into two) and recurrent which becomes the inferior laryngeal
What are the branches of the superior laryngeal and what do they supply?
External Laryngeal: Cricothyroid
Internal Laryngeal: Sensory to mucosa above laryngeal ligaments
What does the inferior laryngeal supply?
Intrinsic muscles except cricothyroid and sesnory innervation to mucosa below laryngeal ligaments
What is the blood supply to the larynx?
Comes from above (superior laryngeal vessel with internal laryngeal nerve) and Below (inferior thyroid which is directly anterior to trachea)
