Orbital Anatomy

Question 1

What bones make up the orbital floor?

Answer 1

maxillary bone, palatine bone, orbital plate of zygomatic bone

Question 2

What do the infraorbital groove and canal transmit?

Answer 2

infraorbital artery and maxillary division (V2) of trigeminal nerve

Question 3

What is/are the surgical landmark(s) for the superior extent of medial wall surgery?

Answer 3

the anterior and posterior ethmoidal foramina

Question 4

What passes through the superior orbital fissure?

Answer 4

CN III, IV, VI; v1, sympathetic nerve fibers, and superior ophthalmic vein (drains into cavernous sinus posteriorly)

Question 5

What passes through the inferior orbital fissure?

Answer 5

v2 (splits into infraorbital n. and zygomatic n.) and branches of infraorbital vein

Question 6

Which orbital wall does not extend to the orbital apex, and what is the termination of this wall?

Answer 6

orbital floor; terminates at pterygopalatine fossa