Nasal Cavity and Pterygopalatine fossa

Question 1

What cartilages make up the external nose?

Answer 1

2 Lateral nasal cartilages, 2 alar cartilages and the septal cartilage in the nasal septum

Question 2

What bones make up the external nose?

Answer 2

Frontal bone, nasal bones, frontal processes of the maxilla bones, and bony part of nasal septum

Question 3

What is the one thing within the nasal cavity that is not lined with nasal mucosa?

Answer 3

Vestibule

Question 4

The olfactory area has a specialized nasal mucosa that contains what?

Answer 4

Peripheral nerve endings for CN I

Question 5

What are the 4 nasal passages?

Answer 5

Sphenoethmoid recess, superior nasal meatus, middle nasal meatus, inferior nasal meatus

Question 6

What is another word for meatus?

Answer 6

Turbinate

Question 7

What drains into the sphenoethmoid recess?

Answer 7

Sphenoid sinus

Question 8

What drains into the superior nasal meatus?

Answer 8

Ethmoid sinus

Question 9

What drains into the middle nasal meatus?

Answer 9

Frontal sinus and the maxillary sinus

Question 10

What drains into the inferior nasal meatus?

Answer 10

Nasolacrimal duct

Question 11

What are the 5 main arteries supplying the nasals cavity?

Answer 11

Anterior and posterior ethmoidal, sphenopalatine, lateral nasal, superior labial

Question 12

What are the 3 main arteries that give off the branches to supply the nose?

Answer 12

Opthalmic, maxillary, facial

Question 13

What is the area where the 5 main arteries come together within the nasal cavity?

Answer 13

Kiesselbach area

Question 14

What is important about kiesselbach area?

Answer 14

Site of profuse bleeding

Question 15

What is the venous drainage of the nasal cavity?

Answer 15

Opthalmic, sphenopalatine and facial veins

Question 16

Nosebleed

Answer 16

Epistaxis

Question 17

What are the contents of the pterygopalatine fossa?

Answer 17

Pterygopalatine ganglion, maxillary nerve and 3rd portion of the maxillary artery

Question 18

Superior border of pterygopalatine fossa

Answer 18

Body of sphenoid

Question 19

Inferior border of pterygopalatine fossa

Answer 19

Pyramidal plate of palatine

Question 20

Medial border of pterygopalatine fossa

Answer 20

Perpendicular plate of palatine

Question 21

Lateral border of pterygopalatine fossa

Answer 21

Infratemporal fossa

Question 22

What connects the pterygopalatine fossa with the infratemportal fossa?

Answer 22

Pterygomaxillary fissure

Question 23

Anterior border of pterygopalatine fossa

Answer 23

Maxilla

Question 24

Posterior border of pterygopalatine fossa

Answer 24

Pterygoid process of sphenoid

Question 25

What exits the inferior orbital fissure?

Answer 25

Zygomatic nerve, infraorbital nerve and infraorbital artery

Question 26

What joins in the pterygoid canal?

Answer 26

Greater petrosal nerve and Deep petrosal nerve

Question 27

Describe how parasympathetic fibers can reach the lacrimal gland

Answer 27

• Presynaptic parasympathetic fibers travel on the greater petrosal nerve (CN VII) through the pterygoid canal to synapse at the pterygopalatine ganglion
• Fibers then jump on the the maxillary nerve
• Continue down the zygomatic nerve and use a communicating branch to reach the lacrimal nerve (V1)
• Fibers reach the lacrimal gland

Question 28

What carries post-synaptic sympathetic fibers to the pterygopalatine fossa and do they synapse at the pterygopalatine ganglion?

Answer 28

Deep petrosal nerve and nope