2c. Foramina of Cranial Nerves (only)

Question 1

Cribriform plate

Answer 1

olfactory n. (CN I)

Question 2

Optic canal

Answer 2

optic n. (CN II)

Question 3

Superior orbital fissure

Answer 3

• oculomotor n. (CN III)
• ophthalmic division of trigeminal n. (CN V - V1)
• abducens n. (CN VI)
• trochlear n. (CN IV)

Question 4

Foramen rotundum

Answer 4

maxillary division of trigeminal n. (CN V - V2)

Question 5

Foramen ovale

Answer 5

mandibular division of trigeminal n. (CN V - V3)

Question 6

Internal acoustic meatus

Answer 6

• facial n. (CN VII) [enters the skull through IAM]
• vestibulocochlear n. (CN VIII)

Question 7

Jugular foramen

Answer 7

• glossopharyngeal n. (CN IX)
• vagus n. (CN X)
• accessory n. (CN XI)

Question 8

Hypoglossal canal

Answer 8

hypoglossal n. (CN XII)

Question 9

Stylomastoid foramen

Answer 9

• Facial n. [somatic motor fibers emerge through stylomastoid foramen to supply musculature]