Orbit Flashcards
what are the origin and insertion of superior rectus?
origin: common tendinous ring
insertion: sclera (anterior to equator)
what are the origin and insertion of inferior rectus?
origin: common tendinous ring
insertion: sclera (anterior to equator)
what are the origin and insertion of medial rectus?
origin: common tendinous ring
insertion: sclera (anterior to equator)
what are the origin and insertion of lateral rectus?
origin: common tendinous ring
insertion: sclera (anterior to equator)
what are the origin and insertion of superior oblique?
origin: body of the sphenoid bone
insertion: sclera (posterior to equator)
what is the trochlea/tendinous pully?
attatches to the frontal bone, and redirects superior oblique backwards into its insertion.
what are the origin and insertion of inferior oblique?
origin: orbital surface of the maxilla (anterior aspect of the orbit)
insertion: sclera (posterior to equator)
what are the origin and insertion of levator palpebrae superioris?
origin: lesser wing of the sphenoid bone
insertion: superior eyelid
what innervates superior rectus?
oculomotor never (CN3)
what innervates inferior rectus?
oculomotor never (CN3)
what innervates medial rectus?
oculomotor never (CN3)
what innervates lateral rectus?
abducent never (CN6)
what innervates superior oblique?
trochlear nerve (CN4)
what innervates inferior oblique?
oculomotor never (CN3)
what innervates levator palpebrae superioris?
oculomotor never (CN3)
what nerves travel through the common tendinous ring?
oculomotor and abducent (CN3 and CN6)
the optic nerve (CN2) exits the skull via the…
optic canal
the oculomotor nerve (CN3) exits the skull via the…
superior orbital fissure
the abducent nerve (CN6) exits the skull via the…
superior orbital fissure
the trochlear nerve (CN4) exits the skull via the…
superior orbital fissure
cavernous sinus contains which artery?
internal carotid artery
