larynx Flashcards
general larynx info
5-7 cm, contains vocal cords, epiglottis> lower circled cart
function
phonation, sphincter, degluttition
3 median cartilages
epiglottis, thyroid cartilage, cricoid cartilage
epiglottis
leaf shape, flexible, upper edge free,.
thyroid cartialge
two lamina, thyroid notch, horns, oblique line (muscle attach), superior boarder- membrane attach
cricoid cartilage
below thyroid c, narrow ant arch, broad posterior lamina, articulate facets, only complete tracheal ring
3 paired cartilage
arytenoid, corniculate, cuneiform
arytenoid cart
small/pyrimdal, back if larynx, base
corniculate cartilage
small, articulate with apex/aryenoid
cuneiform cart
small/rod shaped, in art. folds, no articulation
epiglottis taste bus innervation
vagus
thyroid membrane has opening for
internal laryngeal, superior laryngeal
conus elastics
upper edge cricoid, sound production, closed rims glottis
glottis
vocal cords and space between
laryngeal inlet
faces back/up, bounded by epiglottis, art cart, Ary. epiglottic fold
laryngeal cavity
inlet> cricoid cartilage, narrowest in rima cart
middle vestibular cavity
vestibular>vocal folds,
extrinsic elevate muscles
myohyoid, digastric, stylohyoid
extrinsic depress muscles
sternohyoid
intrinsic muscle groups (2)
control of inlet size or control of vocal cord movement/tension
control of inlet muscles
oblique/transverse aretenoid, aryepiglottic, thyroepiglottic
oblique/transverse arytenoid
narrow inlet, adduct cords
aryepiglottic
part of upper oblique, narrow inlet/act as sphincter
thyroepiglottic
widen inlet (pull lat)
control vocal cord movement/tension muslces
cricothyroid, thyroaryenoid, vocalis
cricothyroid
increase length/tension, raise pitch (SUPERIOR LARYNGEAL)
vocalis
direct contact with vocal cords… fine tune
vocal cord adductors
lateral cricoarytenoid and transverse arytenoid
vocal cord abductors
posterior cricoaryt
motor
recurrent laryngeal to all intrinsic but circo
sensory
internal above cords, recurrent below.
where is piriform recess
lower laryngopharynx leading to esophagus
where is vallecula
posteror to tonnage and anterior to epiglottis
where is ventricle
between true and false vocal cords
rima glottidis
space between vocal cords
vestibule
region bound by epiglottis, aryepiglottic folds and arytenoid cartilage (above vocal cords)