Larynx/Laryngopharynx Flashcards
borders of the larynx?
starts at epiglottis
ends at C6/lower cricoid cartilage
what part of the laryngeal skeleton is open?
posteriorly
hyoid bone
thyroid cartilage
what are the 3 structures of the laryngeal skeleton?
hyoid bone
thyroid cartilage
cricoid cartilage
cricoid cartilage is open or closed posteriorly?
closed
what is the arytenoid cartilage? what movements do they do? what are the movements for?
attached to cricoid cartilage
1. swivel
2. slide together and apart
movements to allow for phonation
epiglottic cartilage attaches where?
thyroid cartilage
2 vocal ligaments?
- vestibular fold/false cords
2. vocal fold/true cords
vocal cords are above or below the cricoid cartilage?
above
what muscle slides the arytenoid cartilages together?
transverse and oblique arytenoids
what intrinsic muscles swivel the arytenoids? what direction?
posterior cricoarytenoids: abducts
lateral cricoarytenoids: adducts
what relaxes the vocal folds?
vocalis
what lengthens vocal folds?
cricothyroid muscle
lateral cricoarytenoids do what?
adducts arytenoids
vocalis does what?
releaxes vocal folds
posterior cricoarytenoids do what?
abducts arytenoids
cricothyroid muscle does what
lengthens vocal folds
what innervates vocal cords?
recurrent laryngeal nerve
what innervates upper larynx?
superior laryngeal from vagus
superior laryngeal nerves splits into?
external
internal
where is the best place for emergency airway?
cricothyroid membrane puncture
what is the piriform recess for?
fluids to runs down when swallowing
epiglottis isn’t a perfect seal so what happens when you swallow?
entire larynx and pharynx elevates to make tight seal
what is the aryepiglottic fold for?
lateral boundary of laryngeal inlet
what 3 nerves innervates the pharynx?
- trigeminal: pharyngeal brs of maxillary V2
- CN IX
- CN X internal laryngeal nerve
what innervates stylopharyngeus?
CNIX
what innervates sup, mid, inf constrictor, salpingopharyngeus, palatopharyngeus ?
Vagus CN X
what does CN X not innervate?
stylopharyngeus
