Foramen and Cranial Nerves

Question 1

CN7 (where does it exit skull, branches)

Answer 1

Exits via internal aucoustic meatus and then through the stylomastoid foramen. If then divides into terminal branches at the parotid:
- Ten: temporal
- Zebras: zygomatic
- Broke: buccal
- My: marginal
- Car: cervical

Question 2

What nerves exit foramen rotundum and ovale and lacerum

Answer 2

Rotundum: V2
Ovale: V3
Lacerum: petrosal nerve (taste)

Question 3

What nerves exit the superior orbital fissure (and bonus 2 other structures), and what bony boundaries is it bound by?

Answer 3

CNIII (occulomotor)
CN IV (trochlear)
CN V1 (opthalmic)
CN VI (abducens)

ALSO: superior opthalmic vein, symnpathetic fibers

Bound by the greater and lesser sphenoid wings

Question 4

Which cranial nerves exit through the jugular foramen?

Answer 4

CN XI (glossopharyngeal)
CN X (vagus)
CN XI (spinal accessory)

Question 5

CN VIII exits skull via

Answer 5

Internal aucoustic meatus

Question 6

CN XII

Answer 6

Hypoglossal nerve, exits via hypoglossal canal

Question 7

What are 3 foramen in the sphenoid bone?

Answer 7

Superior orbital fissure, rotundum, ovale, spinosum (remember: manta ray and bat; woman steps on bat wing in high heel)

Question 8

What does the foramen rotundum connect?

Answer 8

The pterygopalatine fossa to the temporal lobe! (PPF -> foramen rotundum -> temporal lobe