Neuro-ophth

Question 1

What is the optic nerve pathway?

Answer 1

Optic nerve -> optic chiasm -> optic tract -> LGN -> optic radiations -> occipital lobe.

Pupillary fibers leave the optic tract before getting to the LGN.

Question 2

What area posterior to the chiasm, if damaged, can cause a monocular VF temporal crescent defect?

Answer 2

The Anterior portion of the calcarine fissure(only area posterior to the chiasm that can cause monocular VF defect).

Question 3

What do the superior and inferior divisions of CN 3 supply?

Answer 3

Superior division: Superior Rectus and Levator.

Inferior division: IR, MR, IO, iris and ciliary muscle.

Question 4

What CN are in the cavernous sinus? Which of these are inside the wall?

Answer 4

CN 3, 4, V1, V2 and 6

CN 3, 4, V1 and V2 are inside the wall.