Topic 14: Orbital Blood Vessels

Question 1

Name branches of ICA & ECA

Answer 1

ICA- OA

ECA- facial artery, infraorbital artery

Question 2

Name branches of OA (7)

Answer 2

Central retinal artrey

Lacrimal artery

Ciliary arteries

Supraorbital

Muscular arteries

Medial palpebral artreues

Supratrochkear

Question 3

Strctures that central retinal artery supplies

Answer 3

Inner retina

NOTE: passes through lamina cribosa and pierced optic nerve sheath branching superiorly and inferiorly. These branches dvide further into nasal and temporal branches, continuing to branch within retinal NFL

Question 4

Lacrimal artrey supplies?

Answer 4

Eyelids, conjunctiva, lacrimal glands

Question 5

Ciliary arteries?

Answer 5

Short Posterior branches - sclera, choroid, ON (circle of haller zinn)

Long posterior branches - anterior sclera, choriod

Anterior cikiary (muscular run forward)- conjunctiva, cornea, episclera

Long posteiror and anterior (anastomose as MAC)- iris and ciliary body

Question 6

Supraorbital

Answer 6

Forehead muscles & eyebrow

Partly SR, SO, LPS, OO

Question 7

Musucular

Answer 7

EOM & LPS

Question 8

Medial palepbral

Answer 8

Eyelids

Question 9

Supratrochlear

Answer 9

Forehead muscles & eyebrow

Question 10

What does ECA supply partially

Answer 10

Facial - eyelids

Infraorbital/maxillary - IO, IR, lower lids