Nasal Cavity

Question 1

Nasal Cavity roof

Answer 1

ANT-POST
Nasal Bone; Nasal spine of frontal bone; cribriform plate (ethmoid); spehnoid bone(sinus); Vomer; plate of medial pterygoid

Question 2

Ethmoid Bone

Answer 2

Middle part: Crita galli, cribriform plate, perpendicular plate

Labryinths: Superior and Middle concha, infundibulum

Question 3

Medial Wall

Answer 3

Septal Cartilage(examined); Perpendicular plate of ethmoid bone; vomer

Question 4

Lateral wall

Answer 4

Nose cartilage, nasal and frontal bone, lacrimal
Ethmoid bone (superior and Middle concha)
Inferior concha
perpendicular palatine and maxilla

Question 5

Paranasal sinuses

Answer 5

Frontal sinuses: Mid/inf conchae semilunar
Maxillary sinuses: Mid/inf conchae
Ethmoidal cells: Between sup and middle, posterior ethmoidal cells. Mid/Inf, anterior and middle cells
Sphenoidal: Opens above superior concha, Spheno-ethmoidal recess

Question 6

Nasal cavity Blood supply

Answer 6

Posterior: Sphenopalatine artery and its branches

Anterior: Anastomosis of: Anterior and posterior ethmoidal arteries (from IC), nasal artery from superior labial, terminal end of greater palatine artery.
This area is Little’s Area

Question 7

Venous drainage and lymphatics

Innervation

Answer 7

Lymphatics: Drain into submandibular

Venous: Special is nasal vein to foramen cecum

Innervation: Olfactory, Ant ethmoidal+infraorbital, nasopalatine nerves

Question 8

Facial nerve research

Answer 8

Porion(sup tragus)
Supraorbital notch
Inferior orbital rim

Any lesion in traingle of SOML. IOML and porion, refer to specialist

Between porion line and zygomatic sutural line, temporal branches of the facial nerve

Soft tissue branches are not as good a landmarks as bony