Neuro-Ophthalmology Vol. 1

Question 1

Where is the sella turcica located?

Answer 1

Posteromedial to the orbits within the body of sphenoid bone

Question 2

What structure separates the greater and lesser wings of the sphenoid?

Answer 2

Superior orbital fissure

Question 3

Where are the cavernous sinuses located?

Answer 3

On each side of the sella turcica

Question 4

What structure passes through the cribriform plate?

Answer 4

CN I

Question 5

What structure passes through the foramen ovale?

Answer 5

Mandibular division (V3) of trigeminal nerve

Question 6

What structure passes through the foramen rotundum?

Answer 6

Maxillary division (V2) of trigeminal nerve

Question 7

What structure marks the inferior border of the anterior cranial fossa?

Answer 7

Frontal ethmoidal suture

Question 8

What nerve is the supraorbital nerve a terminal branch of?

Answer 8

Frontal nerve

Question 9

What structure separates the orbit from the middle cranial fossa?

Answer 9

Greater wing of sphenoid

Question 10

What structure forms the medial wall of the optic canal?

Answer 10

Sphenoid sinus

Question 11

What structure is at risk of damage during surgery involving the sphenoid sinus?

Answer 11

Optic nerve

Question 12

What is the average height of the orbit?

Answer 12

35 mm

Question 13

What is the average width of the orbit?

Answer 13

45 mm

Question 14

What is the average total volume of the orbit?

Answer 14

30 cc

Question 15

What is the average depth of the orbit?

Answer 15

40 mm

Question 16

What 4 bones make up the orbital rim?

Answer 16

1. Frontal 2. Zygomatic 3. Maxillary 4.Lacrimal

Question 17

What structure makes up the largest portion of the medial wall?

Answer 17

Lamina papyracae of the ethmoid bone

Question 18

What structure separates the optic canal from the superior orbital fissure?

Answer 18

Optic strut

Question 19

What structure lies posterior to the superior orbital fissure?

Answer 19

Cavernous sinus

Question 20

What blood vessels do the anterior posterior ethmoidal foramen connect?

Answer 20

Internal carotid circulation and external carotid circulation

Question 21

Where does the right common carotid artery originate?

Answer 21

Innominate artery

Question 22

Where do the vertebral arteries enter the skull?

Answer 22

Foramen magnum

Question 23

What vessels merge to form the basilar artery?

Answer 23

Vertebral arteries

Question 24

Where does the basilar artery terminate?

Answer 24

At the posterior cerebral arteries at the level of the midbrain

Question 25

Where is the basilar artery located?

Answer 25

Along the anterior surface of the pons

Question 26

Where does the common carotid artery bifurcate into the internal and external carotid artery?

Answer 26

At the C2 level near the angle of the jaw

Question 27

What artery supplies the paranasal sinuses?

Answer 27

Maxillary artery

Question 28

What artery supplies the middle meningeal artery?

Answer 28

External carotid artery via the maxillary artery

Question 29

Through what structure does the middle meningeal artery enter the skull?

Answer 29

Foramen spinosum (lateral to foramen ovale)

Question 30

What complication may occur in the treatment of AVM by neuroradiological manipulation of instruments into the external carotid artery?

Answer 30

Embolization of the distal branches of the ICA and central retinal artery (due to collaterals)