Cranial Nerves/Fossa

Question 1

Bones of anterior cranial fossa

Answer 1

frontal, ethmoid, sphenoid

Question 2

Bones of middle cranial fossa

Answer 2

Sphenoid, temporal

Question 3

Bones of posterior cranial fossa

Answer 3

Temporal and occipital bones

Question 4

What passes through foramen oval?

Answer 4

CN V3

Otic ganglion

Accessory meningeal artery

Lesser petrosal nerve

Emissary veins

Question 5

What carries the middle meningeal artery?

Answer 5

Foramen spinosusm

Question 6

Describe the route of the internal carotid

Answer 6

Enters cranium through carotid canal.

Then enters foramen lacerum but does not pass all the way through.

ICA then lies either side of sphenoid and enters cavernous sinus before joining circle of willis

Question 7

Where is the primary olfactory cortex?

Answer 7

Prepiriform area of amygdala

Question 8

Where do 90% of visual fibres go and where do the remaining 10% go?

Answer 8

90% to lateral geniculate (thalamus) then visual cortex

10% non-geniculate

Question 9

Nerve supply to stapedius?

Answer 9

Facial

Question 10

In the petrous temporal bone what branches does the facial nerve send to different areas?

Answer 10

Greater petrosal nerve - lacrimal

Chorda tympani - submandibular and sublingual glands

Question 11

Describe path of recurrent laryngeal branch of vagus

Answer 11

wraps around aortic arch on left and around subclavian artery on right