Nasal Cavity/Paranasal Sinuses

Question 1

anterior roof of the nasal cavity

Answer 1

nasal and frontal bones

Question 2

central part of roof

Answer 2

cribriform plate of ethmoid bone

Question 3

posterior roof

Answer 3

body of sphenoid bone

Question 4

anterior 3/4 of the floor

Answer 4

palatine process of maxilla

Question 5

posterior 1/3 of the floor

Answer 5

horizontal plate of palatine bone

Question 6

frontal sinus drains via _____ into the ____ through _____

Answer 6

frontonasal duct/canal; infundibulum; hiatus semilunaris

Question 7

from semilunar hiatus , enters the _____ of the nasal cavity, anterior to the ____

Answer 7

middle meatus; ethmoidal bulla

Question 8

superior wall of maxillary sinus separates:

Answer 8

sinus from orbit

Question 9

medial wall of maxillary sinus separates:

Answer 9

sinus from nasal cavity

Question 10

lateral wall of maxillary sinus separates:

Answer 10

sinus from infratemporal fossa

Question 11

opening to the maxillary sinus is called the _____

Answer 11

maxillary sinus ostium

Question 12

nasal cavity shares border with:

Answer 12

oral cavity, orbit, and anterior cranial fossa

Question 13

anterior ethmoidal air cells drain into the ____

Answer 13

semilunar hiatus

Question 14

middle ethmoidal air cells drain into the ____

Answer 14

ethmoidal bulla

Question 15

posterior ethmoidal air cells drain into the ____

Answer 15

superior meatus

Question 16

the sphenoidal sinus drains into the _____

Answer 16

sphenoethmoidal recess

Question 17

arterial supply of nasal cavity

Answer 17

anterior ethmoidal branches
posterior ethmoidal branches
sphenopalatine branches
facial branches
maxillary branches

Question 18

anterior ethmoidal branches supply:

Answer 18

upper anterior septum and lateral wall

Question 19

posterior ethmoidal branches supply:

Answer 19

upper posterior septum and lateral wall

Question 20

sphenopalatine branches supply:

Answer 20

lower septum and lateral wall

Question 21

the maxillary sinus opens into the ____ which is ____ to it

Answer 21

middle nasal meatus; superior

Question 22

the maxillary ostium is almost always found ____ to the semilunar hiatus

Answer 22

posterior

Question 23

branches of sphenopalatine a.

Answer 23

posterior lateral nasal branches

posterior septal branch

Question 24

CN V1 contribution to general sensory of nasal cavity

Answer 24

nasociliary n.
(external nasal branch of anterior ethmoidal nerve on the lateral wall and septal branch of anterior ethmoidal n. on the septum)

Question 25

CN V2 contributions to general sensory of nasal cavity

Answer 25

infraorbital n.
nasopalatine n. (on septum)
anterior superior alveolar n.
posterior superior lateral nasal nn.
posterior inferior lateral nasal nn.

Question 26

nerves of the paranasal sinuses

Answer 26

maxillary (V2)- general sensory
greater petrosal (CN VII)- parasympathetics
deep petrosal (T1)- sympathetics
all travel to sinuses on branches of V2 (maxillary n.)