Cranial Fossa

Question 1

Anterior Cranial Fossa

Answer 1

CN I

lesser wing of SPHENOID

Question 2

Middle Cranial Fossa

Answer 2

CN II, III, IV, V, VI

petrous part of TEMPORAL bone

Question 3

Posterior Cranial Fossa

Answer 3

CN VII, VIII, IX, X, XI, XII

Question 4

Anterior Cranial Fossa

CRIBRIFORM PLATE OF ETHMOID

Answer 4

CN I (Olfactory nerve)

Question 5

Middle Cranial Fossa

OPTIC CANAL

Answer 5

CN II (Optic nerve)
Ophthalmic artery
Central artery and vein of retina

Question 6

Middle Cranial Fossa

SUPERIOR ORBITAL FISSURES

Answer 6

CN III (Oculomotor)
CN IV (Trochlear)
CN VI (Abducens)
CN V1 (ophthalmic branch of trigeminal nerve)

ophthalmic veins

Question 7

Middle Cranial Fossa

FORAMEN ROTUNDUM

Answer 7

CN V2 (maxillary branch of trigeminal nerve)

Question 8

Middle Cranial Fossa

FORAMEN OVALE

Answer 8

CN V3 (mandibular branch of trigeminal nerve)

Accessory meningeal artery

Question 9

Middle Cranial Fossa

FORAMEN SPINOSUM

Answer 9

Middle Meningeal Artery and Vein

Meningeal branch of mandibular nerve

Question 10

Middle Cranial Fossa

FORAMEN LACERUM

Answer 10

empty

traversed by ICA

Question 11

Posterior Cranial Fossa

INTERNAL ACOUSTIC MEATUS

Answer 11

CN VII (Facial nerve)

CN VIII (Vestibulocochlear nerve)

Labyrinthine artery

Question 12

Posterior Cranial Fossa

JUGULAR FORAMEN

Answer 12

CN IX (Glossopharyngeal nerve)

CN X (Vagus nerve)

CN XI (Spinal Accessory)

Question 13

Posterior Cranial Fossa

HYPOGLOSSAL CANAL

Answer 13

CN XII

Question 14

Posterior Cranial Fossa

FORAMEN MAGNUM

Answer 14

medulla of the brainstem
CN XI
vertebral arteries

Question 15

Posterior Cranial Fossa

CONDYLOID FORAMEN

Answer 15

Emissary vein

Question 16

Posterior Cranial Fossa

MASTOID FORAMEN

Answer 16

Branch of occipital artery to the dura

Emissary vein