Orbits Flashcards
The holes where the eyes go is called?
Orbits
Orbits are composed of what bones?
Frontal, Ethmoid, Lacrimal, zygomatic, sphenoid, maxilla
Ethmoid bones is part of the orbits is it anterior or posterior?
Posterior
Lacrimal bones is part of the orbits is it anterior or posterior?
Anterior
In the orbits the frontal bone is located where?
Superior wall
What creates the median wall in the orbits?
Ethmoid and Lacrimal
What creates the lateral wall of orbit?
Zygomatic and sphenoid bones
What creates the inferior wall of the orbit/floor of the orbit?
Maxilla
What bone is the apex of the orbit?
Sphenoid bone
What is the weakest part of the orbit?
Maxilla bone/inferior wall (floor)
What is a fissure?
Opening in bone that is narrow and cleft like
What cranial nerves go through the superior orbital fissure?
III, IV, V, VI (3, 4, 5, 6)
Nerve V and how many roots/trunks?
3, (V1, V2, V3)
What vein drains the superior orbital fissure?
Ophthalmic vein (superior)
What drains muscles of extra-occular movement?
Ophthalmic vein (superior)
Where is the superior orbital fissure located?
Between the greater and lesser wings of sphenoid
What cranial nerves o through the inferior orbital fissure?
Branches of V2
The nerves of V2 that transfer through the inferior orbit fissure are?
Infraorbital and zygomatic nerves
What is the artery that goes to the inferior orbital fissure?
Infraorbital artery
What is the vein that goes to the inferior orbital fissure?
Ophthalmic vein
Where is the inferior orbital fissure located?
Between greater wing of sphenoid and maxilla
What transmits cranial nerve II?
Optic Canal
What transmits Ophthalmic artery?
Optic Canal
Where is the optic canal located?
Within the lesser wing of sphenoid
Where is the infraorbital foramen located?
Maxilla
Infraorbital foramen transmits what nerve?
Infraorbital nerve
Infraorbital nerve is a direct continuation of?
V2
What isn’t part of the orbit but is close?
Infraorbital foramen
