Pterygopalatine Fossa and Nasal Cavity Wright DSA

Question 1

What are the cartilagenous parts of the nose?

Answer 1

• 2 lateral cartilages
• 2 alar cartilages
• septal cartilage

Question 2

Every part of the nasal cavity is lined with nasal mucosa except ____.

Answer 2

Vestibule

Question 3

What is the respiratory area of the nose?

Answer 3

inferior 2/3

Question 4

What is the olfactory area in the nose?

Answer 4

Superior 1/3

• olfactory has specialized nasal mucos a that has peripheral nerve endings from CN I

Question 5

What are the boundaries of the nasal cavity?

Answer 5

• Roof: frontal bone
• Floor: palatine process of maxilla horizontal plate of palatine bone
• Medial wall: nasal septum
• Lateral wall: superior middle inferior concha

Question 6

The sphenoethmoidal recess is the opening to ___.

Answer 6

1. Spenoethmoidal recess is opening of sphenoid sinus

Question 7

What supplies most of the blood to the lateral and medial walls of the nasal cavity?

Answer 7

• Branches of the opthalmic artery called anterior and posterior ethmoid arteries
• Maxillary artery branches of sphenopalatine and greater palatine
• Facial artery branches supeior labial and lateral nasal branches

Question 8

What is Kiesselbach’s area?

Answer 8

Where all five arteries of the lateral and septum wall come together into a capillary bed that can bleed profusely

Question 9

Describe the Maxillary sinus?

Answer 9

• In maxilla- the largest
• innervation is the superior alveolar nerve
• Arterial supply is superior alveolar branches of maxillary and greater palatine

Question 10

What veins drain the nasal cavity?

Answer 10

SPhenopalatine

Facial

Opthalmic

Question 11

Ethmoid sinus innervation and arterial supply?

Answer 11

• Ethmoidal arterires from the opthalmic artery
• Innervation nasocilliary (V1)

Fun facts? Not sure if we need to know or not?

• anterior and middle drain into the middle meatus
• posterior drains into superior meatus

Question 12

Sphenoid sinus arterial supply and nerve?

Question 13

Frontal sinus?

Answer 13

• supraorbital artery and anterior ethmoidal artery
• Supraorbital nerves V1

Question 14

Borders of the pterygopalatine fossa?

Answer 14

• anterior: maxillary tuberosity
• Posterior: pterygoid process of sphenoid
• Medial: perpendicular plate of palatine bone
• Lateral: opens into infratemporal fossa via pterygomaxillary fissure
• Roof: incompjlete greateer wing of sphenoid
• Floor: pyramidal process of palatine bone

Openings:

• Superior: opens into inferior orbital fissue
• Inferior: clsoed except for palatine foramen

Question 15

What nerve is in the pterogopalatine fossa?

Answer 15

V2 Maxillary nerve which travels through Foramen rotundum

Question 16

What are the contents of pterygopalatine fossa

Answer 16

• Maxillary nerve V2
• Pterygopalatine ganglion
• 3rd part of maxillary artery

Question 17

Describe the braches to get parasympathetic fibers to the lacrimal nerve V1

Answer 17

• Parasympathetic fibers jump on
• maxillary nerve V2 then
• Zygomatic nerve then
• Zygomaticotemporal nerve and finally
• Lacrimal nerve (V1) (parasympathetic fibers)

Question 18

What forms the nerve of the pterygoid canal?

Answer 18

Greater petrosal (parasymp. part) joins deep petrosal (sympathetic part) to form nerve of pterygoid canal

Question 19

Infra orbital nerve travels through ___

Answer 19

INfraorbital fissure

Question 20

Maxillary nerve travels through ___.

Answer 20

Foramen rotundum

Question 21

Greater and lesser palatine nerves go to _____.

Answer 21

Greater to hard palate

lesser to soft palate

Question 22

The Superior nasal meatus is the opening of ____

Answer 22

Ethmoidal sinus

Question 23

Middle nasal meatus is the opening of _____.

Answer 23

Frontal sinus

Question 24

Maxillary sinus opens into_____ in the posterior part of the semilunar hiatus of maxillary ostium (below ethmoid bulla)

Answer 24

middle nasal meatus

Question 25

Inferior nasal meatus is the opening of ____.

Answer 25

Nasolacrimal duct