Foramina and canals

Question 1

Cribriform foramina

Answer 1

Olfactory nerve (CN 1)

Question 2

Posterior ethmoidal foramen

Answer 2

1. Posterior ethmoidal artery & vein
2. Posterior ethmoidal nerve

Question 3

Optic canal

Answer 3

1. Optic nerve (CN 2)
2. Ophthalmic artery

Question 4

Superior orbital fissure

Answer 4

1. Oculomotor nerve (CN 3)
2. Trochlear nerve (CN 4)
3. Ophthalmic nerve (CN V1)
4. Abducens nerve (CN 6)
5. Superior ophthalmic vein

Question 5

Foramen rotundum

Answer 5

Maxillary nerve (CN V2)

Question 6

Foramen ovale

Answer 6

1. Mandibular nerve (CN V3)
2. Accessory branch of middle meningeal artery
3. Lesser petrosal nerve

Question 7

Foramen spinosum

Answer 7

1. Middle meningeal artery and vein
2. Meningeal branch of mandibular nerve

Question 8

Carotid canal

Answer 8

1. Internal carotid artery
2. Internal carotid plexus

Question 9

Internal acoustic meatus

Answer 9

1. Facial nerve (CN 7)
2. Vestibulocochlear nerve (CN 8)
3. Labyrinthine artery

Question 10

Jugular foramen

Answer 10

1. Inferior petrosal sinus
2. Glossopharyngeal nerve (CN 9)
3. Vagus nerve (CN 10)
4. Spinal accessory nerve (CN 11)
5. Sigmoid sinus
6. Posterior meningeal artery

Question 11

Hypoglossal canal

Answer 11

Hypoglossal nerve (CN 12)

Question 12

Foramen magnum

Answer 12

1. Medulla oblongata
2. Veterbral artery
3. Meningeal branches of vertebral artery
4. Spinal roots of accessory nerve