19: Nasal Cavity and Sinuses

Question 1

boundaries of nasal cavity

Answer 1

roof: ethmoid, sphenoid bones
floor: hard palate (maxillary and palatine bones)
medial: septum
lateral: concha
anterior: external nares (apterture)
posterior: internal nares

Question 2

palatine bone contains

Answer 2

palatine canal and sphenopalatine foramen

Question 3

palatine canal contains

Answer 3

descending palatine a.

greater and lesser palatine nn. (give rise to posterior inferior lateral nasal branches through lateral nasal wall)

Question 4

sphenopalatine foramen contains

Answer 4

sphenopalatine n.a.v.

Question 5

the meatus is located

Answer 5

below the corresponding concha

Question 6

kiesselback area

Answer 6

rich in anastomosing arteries; why sometimes noses won’t stop bleeding

Question 7

nasal cavity is split diagonally between

Answer 7

V1 and V2 innervation

Question 8

arterial supply to nasal cavity provided by

Answer 8

branches of
opthalmic
maxillary
facial aa.

Question 9

nasal septum arteries from opthalmic a.

Answer 9

posterior ethmoid a.

anterior ethmoid a.

Question 10

lateral nasal wall arteries from opthalmic a.

Answer 10

posterior ethmoid a.

anterior ethmoid a.

Question 11

nasal septum arteries from maxillary a

Answer 11

medial (septal) posterior nasal branches (from sphenopalatine a.)
nasopalatine a. (from sphenopalatine a.)
greater palatine a.

Question 12

incisive canal - important

Answer 12

anastomosis between nasalpalatine a. (fr. sphenopalatine a.) and greater palatine a. (fr. descending palatine a.)

Question 13

nasalpalatine a. is from

Answer 13

sphenopalatine a.

Question 14

greater palatine a. is from

Answer 14

descending palatine a.

Question 15

lateral nasal wall arteries from maxillary artery

Answer 15

superior lateral posterior nasal branches (fr. sphenopalatine a.)
inferior lateral posterior nasal branches (fr. descending palatine a.)

Question 16

sphenopalatine a. branches into

Answer 16

medial (septal) posterior nasal aa.
nasopalatine a.
superior lateral posterior nasal aa.

Question 17

descending palatine a. branches into

Answer 17

greater palatine a.

inferior lateral posterior nasal branches

Question 18

nasal septum arteries from facial artery

Answer 18

septal branch of superior labial a.

Question 19

lateral nasal wall arteries from facial artery

Answer 19

lateral nasal a. branches of facial a.

Question 20

venous drainage of nasal cavity

Answer 20

opthalmic vv.

pterygoid plexus of vv.

Question 21

nerve supply to nasal cavity

Answer 21

V1 opthalmic (general sensation)
V2 maxillary (general sensation)
CN 1 olfactory (olfaction - special sense)