Nasal Cavity

Question 0

Boundaries of Nasal Cavity

Answer 0

Roof: Nasal, Frontal, Ethmoid, Sphenoid

Floor: Maxillary, Palatine

Medial: Cartilage, Ethmoid, Vomer

Lateral: Nasal, Maxillary, Inferior Concha, Palatine, Ethmoid, Sphenoid

Question 1

Nasal fracture

Answer 1

Breaks the cribiform plate

=>CSF leakage from nose

Question 2

Ethmoidal Bulla

Answer 2

Rounded elevation below middle concha formed by Middle Ethmoidal air cells

Question 3

Hiatus Semilunaris

Answer 3

C-shaped slit below ethmoidal bulla

Question 4

Infundibulum

Answer 4

Anterior part of the hiatus semilunaris

Question 5

Sphenoethmoidal Recess

Answer 5

Contains the olfactory foramina

Question 6

Somatic Sensory nerves of the nasal cavity

Answer 6

1. Anterior Ethmoidal (V1)
2. Nasal branches (V2)
3. Nasopalatine (V2)

Question 7

Arteries of Nasal Cavity

Answer 7

1. Anterior/Posterior Ethmoidal
2. Sphenopalatine
3. Facial (branches)

Question 8

Epistaxis

Answer 8

“Nosebleed”

• Is extensive due to anastomoses in nose
• If spurting = arterial

Question 9

Paranasal Air Sinuses

Answer 9

• Lightens bones but allows for spread of infxn
  1. Frontal
  2. Ethmoid (infxn=>orbit)
  3. Sphenoid
  4. Maxillary (contains roots of teeth)

Question 10

Primary Palate

Answer 10

Anterior to incisive foramen; formed by the fusion of the medial processes

Question 11

Posterior Palate

Answer 11

Posterior to incisive foramen; formed by fusion of maxillary process

Question 12

Anterior Cleft Palate

Answer 12

“Cleft lip”

-Failure of fusion of medial nasal processes

Question 13

Tonsillar Bed

Answer 13

Formed by superior pharyngeal constrictor muscle and stylopharyngeus

• Receives blood from tonsillar branches of facial artery; drains to pharyngeal plexus of veins
• IX can be damaged here

Question 14

Deglutition

Answer 14

1. Bolus formed by tongue
2. Styloglossus and mylohyoid push bolus back
3. Tensor palati, levator palati, and stylopharyngeus elevate the soft palate to block the nasal cavity
4. Pharyngeal constrictors contract and pull food down

Question 15

Nodes enlarged in tonsillitis

Answer 15

Jugulo-digastric lymph nodes

Question 16

Openings into Sphenoethmoidal recess

Answer 16

1. Olfactory foramina

2. Sphenoid air sinus

Question 17

Openings into Superior Meatus

Answer 17

1. Posterior ethmoidal air cells

Question 18

Openings into Middle Meatus

Answer 18

1. Middle ethmoidal air cells
2. Anterior Ethmoidal air cells
3. Maxillary sinus
4. Frontal sinus

Question 19

Openings into Inferior Meatus

Answer 19

Nasolacrimal duct