Nasal Cavity Flashcards
Kiesselbach’s plexus anastomoses
1) Sphenopalatine artery
2) Ethmoidal
3) Greater palatine -loops back up through the incisive foramen
4) Superficial blood – from superior labial artery
Epistaxis
nosebleeds
o From a hemorrhage from the nasal cavity
o May be localized or systemic based on cause
o Typically treated symptomatically, can cauterize
what are 4 paranasal sinuses
frontal, ethmoidal, sphenoid, maxillary
frontal sinus
- CN 5 V1
* Drains into middle meatus at semilunar hiatus
ethmoidal sinus
- CN 5 V1/V2
- Is covered by the ethmoid bulla
- –Most prominent air cells found deep to bulla
- Dumps into superior and middle nasal meatus
sphenoid sinus
- CN 5 V1/V2
* Passes through the sphenoethmoidal foramen at sphenoethmoidal recess
maxillary sinus
- CN5 V2
- Drains into middle meatus at semilunar hiatus
- Prone to infection bc anatomically the opening is way far superior relative to the rest of the sinus. Therefore, most sinuses logically drain DOWN, but the maxillary sinus does not; so it doesn’t drain well
- Referred pain to teeth due to maxillary sinus infections
semilunar hiatus
opening for both the maxillary and frontal sinues
sinusitis
o inflammation of the lining of ostium causing it to close so you can no longer drain AND oxygen no longer gets in
o becomes stagnant due to increased production of mucus and less drainage
o cause: bacterial, viral, allergies, inflammation
o treatment: neti pots to drain as therapy
sinus lifts aka maxillary sinus augmentation
o bone naturally resorbs without teeth there
o important for max. implants –implants rely on osseointegration
nasopharynx
- C1, dens
- Posterior nasal cavity down to tip of uvula
- Location of pharyngeal tonsils
- ONLY airway
Oropharynx
- C2/C3
- Tip of uvula to tip of epiglottis
- BOTH air and food
Laryngopharynx
- C4-6
- BOTH air and food
- Tip of epiglottis down to bifurcation of pathways
innervation
o pharyngeal pexus = motor from CN10, sensory from CN9, and sympathetic
- -pharyngeal branch of 10 = SVE, motor
- -pharyngeal branch of 9= GVA, sensory
gag reflex
initiated by afferent limb of glossopharyngeal (CN9) BUT the actual constriction of muscles is vegas CN10
what is piriform aperture?
entrance to nasal cavity created by nasal bone and maxillary bone
what do you find inside piriform aperture
- boney part of septum made of two bones
- -perpendicular plate of ethmoid bone
- -vomer
- anterior nasal spine of maxillary = anterior
- visibly middle and inferior nasal concha= lateral
nasal concha
- superior and middle part of ethmoid bone
- inferior concha is its OWN bone
choanae
connection between nasal cavity and nasal pharynx
blood supply to nasal cavity is mainly from?
sphenopalatine artery
meatuses
spaces between concha that are covered by mucosal lining and also known as tubrbintines
what are the 4 papilla of the tongue? which ones are taste?
1) filiform - no taste
2) fungiform
3) foliate
4) circumvallate
what papillae have von Ebner glands?
circumvalte - to secrete solution to remove taste
filiform
no taste
create sandpaper texture
fungiform
many taste buds
located on pral part (CN7)
foliate
located along lateral tongue only, 4-5 rdiges (CN7)
circumvallate
anterior to sulcus terminalis
part of paryngeal tongue (CN9)
largest
von Ebner glands
what do taste buds taste?
bitter, salty, sweet, unami
*skittles are a lie
