Cranial Foramina

Question 1

What structures are conducted in the cribriform foramina in the cribriform plate?

Answer 1

Olfactory nerve (CN I)
Anterior ethmoidal nerves

Question 2

Which cranial fossa is the cribriform foramina in?

Answer 2

Anterior cranial fossa

Question 3

Which cranial bone is the cribriform foramina bounded by?

Answer 3

Ethmoid bone

Question 4

What structures are conducted by the optic canal?

Answer 4

Optic nerve (CN II)
Ophthalmic artery

Question 5

Which cranial fossa is the optic canal in?

Answer 5

Middle cranial fossa

Question 6

Which cranial bone is the optic canal bounded by?

Answer 6

Sphenoid bone

Question 7

What structures are conducted by the superior orbital fissure? (9)

Answer 7

Lacrimal nerve
Frontal nerve (branch of CN V1)
Superior ophthalmic vein
Trochlear nerve (CN IV)
Superior division of the oculomotor nerve (CN III)
Nasociliary nerve (branch of CN VI)
Inferior division of oculomotor nerve (CN III)
Abducens nerve (CN VI)
Branch of the inferior ophthalmic vein

Question 8

Which cranial fossa is the superior orbital fissure in?

Answer 8

Middle cranial fossa

Question 9

Which cranial bone is the superior orbital fissure bounded by?

Answer 9

Sphenoid bone

Question 10

What structure is conducted by the foramen rotundum?

Answer 10

Maxillary branch of trigeminal nerve (CN V)

Question 11

Which cranial fossa is the foramen rotundum in?

Answer 11

Middle cranial fossa

Question 12

Which cranial bone is the foramen rotundum bounded by?

Answer 12

Sphenoid bone

Question 13

What structure is conducted by the foramen ovale?

Answer 13

Mandibular branch of trigeminal nerve (CN V)

Question 14

Which cranial fossa is the foramen ovale in?

Answer 14

Middle cranial fossa

Question 15

Which cranial bone is the foramen ovale bounded by?

Answer 15

Sphenoid bone

Question 16

What structures are conducted by the foramen spinosum?

Answer 16

Middle meningeal artery
Middle meningeal vein
Meningeal branch of CN V3

Question 17

Which cranial fossa is the foramen spinosum in?

Answer 17

Middle cranial fossa

Question 18

Which cranial bone is the foramen spinosum bounded by?

Answer 18

Sphenoid bone

Question 19

What structures are conducted by the internal acoustic meatus?

Answer 19

Facial nerve (CN VII)
Vestibulocochlear nerve (CN VIII)
Vestibular ganglion
Labyrinthine artery

Question 20

Which cranial fossa is the internal acoustic meatus in?

Answer 20

Middle cranial fossa

Question 21

Which cranial bone is the internal acoustic meatus bounded by?

Answer 21

Petrous part of temporal bone

Question 22

What structures are conducted by the jugular foramen?

Answer 22

Glossopharyngeal nerve (CN IX)
Vagus nerve (CN X)
Accessory nerve (CN XI)
Jugular bulb
Inferior petrosal and sigmoid sinuses

Question 23

Which cranial fossa is the jugular foramen in?

Answer 23

Posterior cranial fossa

Question 24

Which cranial bones is the jugular foramen bounded by? (anterior and posterior)

Answer 24

Anterior aspect: petrous portion of the temporal

Posterior aspect: occipital bone

Question 25

What structure is conducted by the hypoglossal canal?

Answer 25

Hypoglossal nerve (CN XII)

Question 26

Which cranial fossa is the hypoglossal canal in?

Answer 26

Posterior cranial fossa

Question 27

Which cranial bone is the hypoglossal canal bounded by?

Answer 27

Occipital bone

Question 28

What structures are conducted by the foramen magnum?

Answer 28

Vertebral arteries
Medulla and meninges
CN XI (spinal division)
Dural veins
Anterior and posterior spinal arteries

Question 29

Which cranial fossa is the foramen magnum in?

Answer 29

Posterior cranial fossa

Question 30

Which cranial bone is the foramen magnum bounded by?

Answer 30

Occipital bone