Lecture 22

Question 1

What does the skeleton of the external nasal comprise of?

Answer 1

• Nasal bones
• Upper & lower nasal cartilages
• Septal cartilage

Question 2

What is the lateral border of the nostril called?

Answer 2

Ala nasi

Question 3

What is the Nasal Septum formed by?

Answer 3

• Vomer
• Perpendicular plate of Ethmoid
• Septal Cartilage

Question 4

What is the roof of the Septum formed by anteriorly?

Answer 4

By the nasal bones & frontal bone

Question 5

What is the roof of the Septum formed by intermediate?

Answer 5

Cribriform plate of the ethmoid

Question 6

What is the roof of the Septum formed by posteriorly?

Answer 6

Body of the sphenoid

Question 7

What does the Perpendicular plate form?

Answer 7

The posterior part of the lateral nasal wall

Question 8

What foramen is associated with the Nasal Septum and where does it open?

Answer 8

• Sphenopalatine foramen
• Opens into the pterygopalatine fossa

Question 9

What is the rounded swelling below the middle concha termed?

Answer 9

Ethmoidal bulla

Question 10

What is the curved gap below the ethmoidal bulla termed?

Answer 10

Hiatus semilunaris

Question 11

What is the area above the
superior concha termed?

Answer 11

Sphenoethmoidal recess

Question 12

List the 2 types of mucous
membrane that line the nasal cavity

Answer 12

1) Olfactory
2) Respiratory

Question 13

List the 4 quadrants

Answer 13

1) Postero-superior quadrant
2) Postero-inferior quadrant
3) Antero-superior quadrant
4) Antero-inferior quadrant

Question 14

What is the Postero-superior quadrant innervated by?

Answer 14

Nasal nerves- Branches of pterygopalatine ganglion (maxillary nerve V2)

Question 15

What is the blood supply to the Postero-superior quadrant?

Answer 15

Sphenopalatine artery- Terminal branch of maxillary artery

Question 16

What is the Postero-inferior quadrant supplied by?

Answer 16

Branches of greater palatine nerve & artery

Question 17

What is the venous drainage?

Answer 17

• Posterior part into pterygoid plexus
• Anterior to facial vein

Question 18

What is the lymph drainage?

Answer 18

• Posterior part to retropharyngeal nodes
• Anterior part to submandibular nodes

Question 19

What is the function of Paranasal Sinuses?

Answer 19

Communicate with the nasal cavity

Question 20

Where do the Frontal sinuses open into?

Answer 20

The middle meatus of the nose

Question 21

What is the nerve and blood supply of the Frontal Sinuses?

Answer 21

Supraorbital nerve & artery

Question 22

Where does the Maxillary sinus open into?

Answer 22

The middle meatus of the nose
- Opening is at a higher level than the floor

Question 23

What is the mucous membrane lining of the Maxillary Sinus innervated by?

Answer 23

Infraorbital & superior alveolar nerves

Question 24

Where does the Ethmoidal air cells open into?

Answer 24

• Anterior & middle groups opens into the middle meatus
• Posterior group into the superior meatus

Question 25

Where does the Sphenoidal Sinus open into?

Answer 25

**Sphenoethmoidal** recess

Question 26

Where is the Sphenoidal Sinus?

Answer 26

Within the **body** of the sphenoid - Pair of sinuses, separated by a thin septum

Question 27

What is the Antero-Inferior quadrant inervated by?

Answer 27

**Anterior superior alveolar** branches of infraorbital nerve & artery

Question 28

What is the Antero-Superior quadrant inervated by?

Answer 28

**Anterior ethmoidal** nerve & artery (Branch of nasocillary nerve - V.1 & ophthalmic artery)