Foramina and Canals of Cranial Base

Question 1

What passes through the Incisive Fossa?

Answer 1

Nasopalatine nerve
Anastomosis of posterior septal branches of sphenopalatine artery and greater palatine artery

Question 2

What passes through Greater Palatine Foramen?

Answer 2

Greater Palatine nerve and vessels

Question 3

What passes through the lesser palatine foramen?

Answer 3

Lesser palatine nerve and vessels

Question 4

What passes through the foramen Lacerum?

Answer 4

Greater Petrosal nerve(passes over foramen)

Question 5

What passes through the foramen Ovale?

Answer 5

Lesser Petrosal Nerve
Mandibular Nerve
Accessory Meningeal Artery

Question 6

What passes through the foramen spinosum?

Answer 6

Middle meningeal vessels
Meningeal branches of mandibular nerve(CN V3)

Question 7

What passes through the carotid canal?

Answer 7

Internal Carotid Artery
Internal Carotid Plexus

Question 8

What passes through the petrotympanic fissure?

Answer 8

Chorda tympani of intermediate nerve(CN VII)

Question 9

What passes through the inferior tympanic canaliculus?

Answer 9

Tympanic branch of glossopharyngeal Nerve(CN IX)

Question 10

What passes through the mastoid canaliculus?

Answer 10

Auricular branch of vague nerve(CN X)

Question 11

What passes through the stylomastoid foramen?

Answer 11

Facial Nerve(CN VII)

Question 12

What passes through the Jugular Fossa?

Answer 12

Glossopharyngeal Nerve
Vagus Nerve
Accessory Nerve
Superior bulb and internal jugular vein

Question 13

What passes through the mastoid foramen?

Answer 13

Mastoid emissary vein
Posterior meningeal artery

Question 14

What passes through the hypoglossal canal?

Answer 14

Hypoglossal Nerve

Question 15

What passes through the foramen Magnum?

Answer 15

Medulla Oblongata
Vertebral arteries and venous plexus
Spinal roots of accessory nerves

Question 16

What passes through Foramen caecum?

Answer 16

Emissary vein to superior sagittal sinus

Question 17

What passes through the nasal slut and anterior ethmoidal foramen?

Answer 17

Anterior ethmoidal artery, vein, and nerve

Question 18

What passes through the foramina of cribriform plate?

Answer 18

Olfactory nerves(CN I)

Question 19

What passes through the posterior ethmoidal foramen?

Answer 19

Posterior ethmoidal artery,vein and nerve

Question 20

What passes through the optic canal?

Answer 20

Optic nerve(CN II), Ophthalmic artery

Question 21

What passes through the superior orbital fissure?

Answer 21

Occulomotor Nerve (CN III)
Trochlear Nerve(CN IV)
Lacrimal, frontal and nasociliary branches of ophthalmic nerve(CN V1)
Abducens Nerve(CN VI)
Superior ophthalmic vein

Question 22

What passes through Foramen Rotundum?

Answer 22

Maxillary Nerve(CN V2)

Question 23

What passes through Foramen Ovale?

Answer 23

Mandibular nerve(CN V3)
Accessory meningeal artery
Lesser Petrosal Nerve

Question 24

What passes through Foramen Spinosum?

Answer 24

Middle meningeal artery and vein
Meningeal branch of mandibular nerve

Question 25

What passes through Foramen Lacerum?

Answer 25

Greater Petrosal Nerve(passes over Foramen) Meningeal branches of ascending pharyngeal artery(from external Carotid artery)

Question 26

What passes through Carotid canal?

Answer 26

Internal carotid artery Internal carotid nerve plexus

Question 27

There are two hiatus on the petrous part of temporal bone for?

Answer 27

Lesser Petrosal Nerve Greater Petrosal Nerve

Question 28

What passes through the Internal Acoustic Meatus?

Answer 28

Facial Nerve(CN VII) Vestibulocochlear Nerve (CN VIII) Labyrinthine artery

Question 29

What passes through the opening of vestibular aqueduct?

Answer 29

Endolymphatic duct

Question 30

What passes through the mastoid foramen?

Answer 30

Emissary vein(and occasional branch of occipital artery)

Question 31

What passes through the Jugular Foramen?

Answer 31

Inferior Petrosal Sinus Glossopharyngeal nerve(CN IX) Vagus Nerve(CN X) Accessory Nerve(CN XI) Sigmoid Sinus Posterior meningeal artery (terminal branch of ascending pharyngeal artery)

Question 32

What passes through the condylar canal?

Answer 32

Emissary vein and meningeal branch of ascending pharyngeal artery

Question 33

What passes through Foramen Magnum?

Answer 33

Medulla Oblongata Meninges Vertebral arteries and venous plexus Meningeal branches of vertebral arteries Spinal roots of accessory nerves