Foramina and Canals

Question 1

Anterior ethmoidal foramen

Answer 1

Anterior ethmoidal artery, vein, and nerve

Question 2

Cribriform plate

Answer 2

Axons of olfactory cells from olfactory nerve

Question 3

Posterior ethmoidal foramen

Answer 3

Posterior ethmoidal artery, vein, and nerve

Question 4

Optic canal

Answer 4

Optic nerve (CN II), ophthalmic artery

Question 5

Superior orbital fissure

Answer 5

Oculomotor nerve (CN III), trochlear nerve (CN IV), ophthalmic nerve (V1), abducens (CN VI), superior ophthalmic vein, sympathetic fibers

Question 6

Foramen rotundum

Answer 6

Maxillary nerve (V2)

Question 7

Foramen ovale

Answer 7

Mandibular nerve (V3), accessory meningeal artery, lesser petrosal nerve

Question 8

Foramen spinosum

Answer 8

Meningeal branch of V3, middle meningeal vessels

Question 9

Foramen lacerum

Answer 9

Greater petrosal nerve

Question 10

Carotid canal

Answer 10

Internal carotid artery, internal carotid plexus/autonomic plexus

Question 11

Internal acoustic meatus

Answer 11

Facial nerve (CN VII), vestibulocochlear nerve (CN VIII), labyrinthine artery

Question 12

Jugular foramen

Answer 12

Glossopharyngeal nerve (CN IX)
Vagus nerve (CN X)
Spinal accessory nerve (CN XI)
Posterior meningeal artery
Superior bulb of internal jugular vein
Sigmoid and inferior petrosal sinus

Question 13

Hypoglossal canal

Answer 13

Hypoglossal nerve (CN XII)

Question 14

Foramen magnum

Answer 14

Medulla oblongata
Meninges
Vertebral arteries 
Anterior and posterior spinal arteries
Spinal accessory nerve (CN XI),

Question 15

Greater palatine foramen

Answer 15

Greater palatine nerve and vessels

Question 16

Lesser palatine foramen

Answer 16

Lesser palatine nerve and vessels

Question 17

Stylomastoid foramen

Answer 17

Facial nerve (VII)

Question 18

Condylar canal

Answer 18

Emissary vein that passes from sigmoid sinus to vertebral veins in neck

Question 19

Mastoid foramen

Answer 19

Mastoid emissary vein

Posterior meningeal artery