Cranium (6A, part 1)

Question 0

What four structures pass through the Superior Orbital fissure?

Answer 0

1. Oculomotor (CN III) nerve
2. Trochlear (CN IV) nerve
3. Abducens (CN VI) nerve
4. Ophthalmic nerve (V1 branch of trigeminal nerve)
   (Also superior ophthalmic vein)

Question 1

What two structures pass through the Optic Canal of the skull?

Answer 1

1. Optic N. (CN II)*
2. Ophthalmic A.

• one mentioned in notes

Question 2

What structure passes through the Foramen Spinosum?

Answer 2

Middle meningeal artery

Question 3

What structure does Foramen Ovale transmit?

Answer 3

Mandibular nerve (V3)

Question 4

What structure does the internal carotid artery enter the skull through (two names)?

Answer 4

Carotid canal ( also called Foramen lacerum)

Question 5

What two structures go through the Internal Acoustic Meatus?

Answer 5

1. Facial nerve (CN VII)

2. Vestibulocochlear nerve ( CN VIII)

Question 6

What 3 nerves pass through the Jugular Foramen?

Answer 6

1. Glossopharyngeal n. (CN IX)
2. Vagus n. (CN X)
3. Accessory n. (CN XI)

(Also, sigmoid sinus and posterior meningeal artery)

Question 7

Through what structure does CN XII. Leave the cranium? Name of the nerve?

Answer 7

Hypoglassal canal; obviously CN XII is Hypoglossal n.

Question 8

Where do spinal branches of CN XI (accessory) enter the cranium before joining the cranial branches and exiting via the Jugular Foramen?

Answer 8

Enter via the Foramen magnum

Question 9

What two elevations in the cranial floor may cause injury to the brain in quick change in acceleration, like in a MVA.

Answer 9

1. Lesser wing of sphenoid

2. Petrous ridge of temporal bone