Nasal Cavity

Question 1

Kiesselbach’s plexus anastomoses

Answer 1

1) Sphenopalatine artery
2) Ethmoidal
3) Greater palatine -loops back up through the incisive foramen
4) Superficial blood – from superior labial artery

Question 2

Epistaxis

Answer 2

nosebleeds
o From a hemorrhage from the nasal cavity
o May be localized or systemic based on cause
o Typically treated symptomatically, can cauterize

Question 3

what are 4 paranasal sinuses

Answer 3

frontal, ethmoidal, sphenoid, maxillary

Question 4

frontal sinus

Answer 4

• CN 5 V1

* Drains into middle meatus at semilunar hiatus

Question 5

ethmoidal sinus

Answer 5

• 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

Question 6

sphenoid sinus

Answer 6

• CN 5 V1/V2

* Passes through the sphenoethmoidal foramen at sphenoethmoidal recess

Question 7

maxillary sinus

Answer 7

• 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

Question 8

semilunar hiatus

Answer 8

opening for both the maxillary and frontal sinues

Question 9

sinusitis

Answer 9

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

Question 10

sinus lifts aka maxillary sinus augmentation

Answer 10

o bone naturally resorbs without teeth there

o important for max. implants –implants rely on osseointegration

Question 11

nasopharynx

Answer 11

• C1, dens
• Posterior nasal cavity down to tip of uvula
• Location of pharyngeal tonsils
• ONLY airway

Question 12

Oropharynx

Answer 12

• C2/C3
• Tip of uvula to tip of epiglottis
• BOTH air and food

Question 13

Laryngopharynx

Answer 13

• C4-6
• BOTH air and food
• Tip of epiglottis down to bifurcation of pathways

Question 14

innervation

Answer 14

o pharyngeal pexus = motor from CN10, sensory from CN9, and sympathetic

• -pharyngeal branch of 10 = SVE, motor
• -pharyngeal branch of 9= GVA, sensory

Question 15

gag reflex

Answer 15

initiated by afferent limb of glossopharyngeal (CN9) BUT the actual constriction of muscles is vegas CN10

Question 16

what is piriform aperture?

Answer 16

entrance to nasal cavity created by nasal bone and maxillary bone

Question 17

what do you find inside piriform aperture

Answer 17

• 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

Question 18

nasal concha

Answer 18

• superior and middle part of ethmoid bone

- inferior concha is its OWN bone

Question 19

choanae

Answer 19

connection between nasal cavity and nasal pharynx

Question 20

blood supply to nasal cavity is mainly from?

Answer 20

sphenopalatine artery

Question 21

meatuses

Answer 21

spaces between concha that are covered by mucosal lining and also known as tubrbintines

Question 22

what are the 4 papilla of the tongue? which ones are taste?

Answer 22

1) filiform - no taste
2) fungiform
3) foliate
4) circumvallate

Question 23

what papillae have von Ebner glands?

Answer 23

circumvalte - to secrete solution to remove taste

Question 24

filiform

Answer 24

no taste

create sandpaper texture

Question 25

fungiform

Answer 25

many taste buds

located on pral part (CN7)

Question 26

foliate

Answer 26

located along lateral tongue only, 4-5 rdiges (CN7)

Question 27

circumvallate

Answer 27

anterior to sulcus terminalis
part of paryngeal tongue (CN9)
largest
von Ebner glands

Question 28

what do taste buds taste?

Answer 28

bitter, salty, sweet, unami

*skittles are a lie