7: Nasal Cavity And Pterygopalatine Fossa

Question 1

Three bones that help form the bony part of the nose

Answer 1

Nasal bones, frontal part of maxilla, nasal part of frontal bone

Question 2

Five cartilages in the nose

Answer 2

2 lateral cartilages
2 alar cartilages
1 Septal cartilage

Question 3

Mucosal lining of nasal cavity

Answer 3

Whole thing is lined with mucosa, besides vestibule of the nose

Question 4

Respiratory vs olfactory area of the nasal mucosa

Answer 4

Respiratory area: inferior 2/3

Olfactory area: superior 1/3

Question 5

What is special about olfactory area of the nasal mucosa

Answer 5

Is specialized and contains peripheral CN 1 nerve endings

Question 6

Three bones that form the roof of the nasal cavity

Answer 6

Frontal bone, ethmoid bone, sphenoid bone

Question 7

Two bones that form the floor of the nasal cavity

Answer 7

Palatine process of maxilla, horizontal plate of palatine bone

Question 8

What five things form the nasal septum (Medial wall of the nasal cavity)

Answer 8

1. Perpendicular plate of ethmoid
2. Vomer
3. Septal cartilage
4. Nasal crests of maxillary bone
5. Nasal crest of palatine bones

Question 9

Three things in the lateral wall of the nasal cavity

Answer 9

Superior, middle, and inferior nasal conchae

Question 10

Four passages divided by nasal conchae

Answer 10

1. Spheno-ethmoid recess
2. Superior nasal meatus
3. Middle nasal meatus
4. Inferior nasal meatus

Question 11

Spheno-ethmoid recess: opening of…?

Answer 11

Sphenoid sinus

Question 12

Superior nasal meatus: opening of…?

Answer 12

Ethmoidal sinuses

Question 13

Middle nasal meatus: opening of…?

Answer 13

Frontal sinus + maxillary sinus

Question 14

Areas where maxillary sinus and frontal sinus open into the middle nasal meatus

Answer 14

Maxillary ostium: for maxillary sinus

Semilunar hiatus: for frontal sinus

Question 15

Inferior nasal meatus: opening for…?

Answer 15

Nasolacrimal duct

Question 16

Four paranasal sinuses

Answer 16

1. Maxillary sinus
2. Ethmoid sinus
3. Sphenoid sinus
4. Frontal sinus

Question 17

What is the largest paranasal sinus?

Answer 17

Maxillary sinus

Question 18

Where is the ethmoid sinus?

Answer 18

Ethmoid air cells, between orbits

Question 19

What divides the sphenoid sinuses?

Answer 19

Bony part of nasal septum

Question 20

Where is the frontal sinus

Answer 20

Between inner and outer tables of the frontal bone

Question 21

Three general A’s that supply the nasal cavity

Answer 21

Ophthalmic A, maxillary A, facial A

Question 22

Three veins that drain the nasal cavity

Answer 22

Ophthalmic V, sphenopalatine V, facial V

Question 23

Five specific A’s that supply the nasal cavity

Answer 23

1. Anterior ethmoid A
2. Posterior ethmoid A
3. Sphenopalatine A
4. Greater palatine A
5. Superior labial A

Question 24

Kiesselbach area

Answer 24

Where all five A’s that supply the nasal cavity come together in a capillary bed, can bleed profusely

Question 25

Where is the pterygopalatine fossa found?

Answer 25

Inferior to apex of orbit

Question 26

Three major contents of the pterygopalatine fossa

Answer 26

1. Maxillary N (from CN V2) 2. Pterygopalatine ganglion 3. 3rd part of maxillary A

Question 27

What do the great petrosal and deep petrosal N form when they join together?

Answer 27

N of the pterygoid canal

Question 28

Where do fibers from the great petrosal N synapse?

Answer 28

Pterygopalatine ganglion

Question 29

Where are all parasymp fibers to the pterygopalatine ganglion from?

Answer 29

Greater petrosal N (from CN 7)

Question 30

Where are sympathetic fibers to the pterygopalatine ganglion from?

Answer 30

Deep petrosal N