Orbit Ocular Anatomy

Question 1

Where does the angular vein originate?

Answer 1

Side of the nose and medial angle of the orbit

Question 2

What does the angular vein send into the orbit?

Answer 2

A nasofrontal branch which joins the supraorbital branch to form the SOV

Question 3

What is the external jugular vein formed by?

Answer 3

Union of Retromandibullar vein and Posterior auricular vein

NOTE: drains blood from superficial face

Question 4

Internal jugular vein is continuation of sigmoid sinus. What does it drain blood from?

Answer 4

Common facial

Occipital

Lingual

Superior and Medial thyroid veins

Question 5

What does the cavernous sinus contain?

Answer 5

3,4,6,V1,V2, ICA, sympathetic fibers

Question 6

Inflammation of SOF and/or cavernous sinus is what?

Answer 6

Toloso-Hunt syndrome

Question 7

What are the tunics of the eye?

Answer 7

1. Fibrous
2. Uveal
3. Neural

Question 8

Where is the confluence of the sinuses located?

Answer 8

Internal occipital protuberance of the occipital bone

Question 9

Where does the anterior facial vein get blood from?

Answer 9

Pterygoid venous plexus AND Superior/Inferior Palpebral veins

Question 10

Where does the common facial vein drain?

Answer 10

Internal Jugular Vein

Question 11

What is Falx Cerebri?

Answer 11

Strong folds of the dura mater that separate the R/L hemispheres of the brain

NOTE: where the superior sagittal sinus is located

Question 12

What does the inferior branch of the inferior ophthalmic vein drain?

Answer 12

Pterygoid plexus

This is to communicate with the facial veins

Question 13

What does the superior branch of the inferior ophthalmic vein drain into?

Answer 13

It drains into the CAVERNOUS SINUS with the Superior Ophthalmic Vein

Question 14

What is the largest vein in the orbit?

Answer 14

Superior Ophthalmic Vein

NOTE: SOV is responsible for the majority of venous drainage in the eye

Question 15

Where does the Superior ophthalmic vein receive blood from?

Answer 15

1. CRV
2. Superior vortex
3. Muscular veins (SR/MR)
4. Lacrimal vein

Question 16

Where does the superior root of the SOV originate?

Answer 16

Superomedial orbital rim from branches of the supraorbital and supratroch veins

Inferior SOV from branches of the angular vein

Question 17

What does the ethmoid artery supply?

Answer 17

1. Sphenoid sinus
2. Frontal sinus
3. Ethmoid sinus

Question 18

What are the terminal branches of the ophthalmic artery?

Answer 18

1. Supratrochlear artery

2. Dorsal Nasal Artery