Orbit 2 Flashcards
(23 cards)
How many extraocular muscles?
7
Whats the origin of the Recuts mm?
Annular Tendineus
V1 splits into which nerves?
Nasal Ciliary
Frontal
Lacrimal
Action of Superior rectus m?
Superiorly and medially
Action of Inferior rectus m?
Inferiorly and medially
What two structures pass through the Annulus?
Optic Nerve and Ophthalmic artery
Which structures pass over the annulus ring?
Ophthalmic vein
trochlear n
Frontal and lacrimal branches of ophthalmic nerve
What’s the origin of the Superior oblique m?
Body of Sphenoid
Whats the action of Superior oblique m?
Moves eye Inferiorly and laterally
Whats the action of the Inferior oblique m
Moves eye Superiorly and laterally
Superior Division of Oculomotor innervates all of the muscles in the orbit that have ____ in their name.
Superior
Frontal nerve of V1 bifurcates into?
Supraorbital and Supratrochlear nn.
Name of the artery that supplies the entire orbit?
Ophthalmic a
Ophthalmic a is a branch of?
internal carotid artery
Name of artery that goes into the eyeball?
Central retinal artery
What nerve does RUNS with Ophthalmic a?
Optic n (II)
Superior ophthalmic vein receives ____ veins from the eyeball.
Verticose
Superior Ophthalmic vein drains into?
Cavernous sinus
Superior ophthalmic vein anastomoses with?
Angular vein branch of facial vein
Major trunk of inferior ophthalmic vein anastomoses with?
Superior ophthalmic vein
Inferior Ophthalmic vein drains into?
Cavernous sinus
Lesser trunk usually leaves the orbit through the inferior orbital fissure and drains to the ____ ____ ____
pterygoid venous plexus
The eye is drained by the ____ ____ of the ____ which normally enters the cavernous sinus directly.
central vein of the retina
