Cranial nerves and foramen and stuff

Question 1

What are the cranial nerves?

Answer 1

Olfactory - CN I

Optic - CN II

Oculomotor - CN III

Trochlear - CN IV

Trigeminal - CN V:

^{Ophthalmic CN V1 - Maxillary CN V2 - Mandibular CN V3}

Abducens - CN VI

Facial - CN VII

Vestibulocochlear - CN VIII

Glossopharyngeal - CN IX

Vagus baby - CN X

Accessory - CN XI

Hypoglossal - CN XII

Question 2

Pneumonic:

Ciaran Only Smokes Spliff Since Rastaman Offered Skunk In Indigenous Jamaica. Jamaican Joint Heaven.

List the foramen of each cranial nerve

Answer 2

I - Cribriform plate - (Ciaran)

II - Optic canal - (Only)

III - Superior orbital fissure - (Smokes)

IV - Superior orbital fissure - (Spliff _Richards)

V₁ - Superior orbital fissure - (Since)

V₂ - Foramen Rotundum - (Rastaman)

V₃ - Foramen Ovale - (Offered)

VI - Superior orbital fissure - (Skunk)

VII - Internal acoustic meatus - (In)

VIII - Internal acoustic meatus - (Indigenous)

IX - Jugular foramen - (Jamaica.)

X - Jugular foramen - (Jamaican)

XI - Jugular foramen - (Joints)

XII - Hypoglossal canal - (Heaven)

Question 3

Identify the foramina x

Answer 3

Question 4

Identify the foramina (red) from below

If you want you can do the other ones as well

Answer 4

Question 5

What structures pass through the Optic canal?

Answer 5

Optic nerve CN II

Ophthalmic artery

Question 7

Name the foramina* in the Anterior cranial fossa.

*just the important ones that we actually care about

Answer 7

Foramina of the Cribriform plate

Olfactory Nerve CN I

Question 8

Name the foramina that pass through the middle cranial fossa

Answer 8

Optic foramen

Superior orbital fissure

Foramen Rotundum

Foramen Ovale

Foramen Spinosum

Foramen Lacerum

Carotid canal

Question 9

Name the foramen of the posterior cranial fossa

Answer 9

Internal acoustic meatus

Jugular foramen

Hypoglossal foramen

Foramen Magnum

Question 10

Optic canal:

A) What passes through it?

B) Which bone is it part of?

Answer 10

A) Optic nerve CN II, Ophthalmic arteries

B) Sphenoid bone

Question 11

Superior orbital fissure:

A) What passes through it?

B) Which bone is it part of?

Answer 11

A)

Cranial nerves III - IV - V₁ - VI

Ophthalmic veins

B)

It lies between the lesser and greater wings of the sphenoid bone

Question 12

Foramen rotundum:

A) What passes through it

B) Bone

C) Bonus point - what foramen is at it’s end?

Answer 12

A)

Maxillary CN V₂

Infraorbital vessels

B) Sphenoid bone

C) It gives rise to the Inferior orbital fissure - through which the Maxillary nerve passes into the orbit

Question 13

Foramen Ovale:

A) Contents

B) Bone

Answer 13

A)

Mandibular nerve CN V₃

Lesser petrosal nerve

B) Sphenoid bone

Lies posterolateral to Rotundum

Question 14

Foramen spinosum:

A) What passes through it?

B) Which bone is it part of?

Answer 14

A) Middle meningeal artery

B) Sphenoid - posterolateral to Foramen Ovale

Question 15

Foramen lacerum:

A) What passes through it?

B) Which bone is it part of?

Answer 15

A) Greater petrosal nerve (not important)

B) located between the sphenoid, apex of petrous temporal and basilar part of occipital

Question 16

Carotid canal:

A) What goes through it

B) Which bone is it part of?

Answer 16

A) Internal carotid artery

• ICA runs over the foramen lacerum

B) Temporal bone

Question 17

Internal acoustic foramen/meatus:

A) What passes through it?

B) Which bone is it part of?

Answer 17

A)

Facial nerve CN VII

Vestibulocochlear nerve CN VIII

B)

Petrous part of the temporal bone

Question 18

Pneumonic:

‘To Zanzibar By Motor Car’

What are the branches of the facial nerve?

Answer 18

Temporal

Zygomatic

Buccal

Mandibular

Cervical