Foramina And Canals Of Cranial Base: Superior View

Question 1

Nasal slit and Anterior ethmoidal Foramen

Answer 1

Anterior ethmoidal artery, vein and nerve

Question 2

Foramina of cribriform plate

Answer 2

Olfactory nerves

Question 3

Posterior ethmoidal Foramen

Answer 3

Posterior ethmoidal vein, artery, and nerve

Question 4

Optic canal

Answer 4

Ophthalmic artery, optic nerve

Question 5

Superior orbital fissure

Answer 5

Oculomotor nerve
Trochlear nerve
Lacrimal, frontal and nasociliary branches of ophthalmic nerve
Abducent nerve
Superior ophthalmic vein

Question 6

Foramen rotundum

Answer 6

Maxillary nerve of the trigeminal nerve

Question 7

Foramen ovale

Answer 7

Mandibular nerve
Accessory meningeal artery
Lesser petrosal nerve

Question 8

Foramen spinosum

Answer 8

Middle meningeal artery and vein

Middle meningeal branch of mandibular nerve

Question 9

Foramen lacerum

Answer 9

Greater petrosal nerve

Question 10

Carotid canal

Answer 10

Internal carotid artery

Internal carotid nerve plexus

Question 11

Internal acoustic meatus

Answer 11

Facial nerve
Vestibulocochlear nerve
Labyrinthine artery

Question 12

Opening of vestibular aqueduct

Answer 12

Endolympathic duct

Question 13

Mastoid Foramen

Answer 13

Emissary vein (and occasional branch of occipital artery)

Question 14

Jugular Foramen

Answer 14

Inferior petrosal sinus
Glossopharyngeal nerve
Vagus nerve
Accessory nerve
Sigmoid sinus
Posterior meningeal artery

Question 15

Condylar canal

Answer 15

Emissary vein

Meningeal branch of ascending pharyngeal artery

Question 16

Hypoglossal canal

Answer 16

Hypoglossal nerve

Question 17

Foramen magnum

Answer 17

Medulla oblongata
Meninges
Vertebral arteries
Meningeal branches of vertebral arteries
Spinal roots of accessory nerve

Question 18

Foramen cecum

Answer 18

Emissary vein to superior Sagittal sinus