THE ORBIT

Question 1

bones that house the eye and associated structures; 7 total; L-orbit

Answer 1

bony orbit

Question 2

what are the bones that comprise the orbit?

Answer 2

everyone
feels 
lazy
prior 
to 
sunday 
morning

ethmoid
frontal 
lacrimal
zygoma
palatine
sphenoid 
maxilla

Question 3

what comprises the lateral wall of the bony orbit?

Answer 3

zygoma
zygomatic process of the frontal bone
greater wing of the sphenoid bone

Question 4

what comprises the roof of the bony orbit?

Answer 4

frontal bone

lesser wing of the sphenoid bone

Question 5

what comprises the medial wall of the bony orbit?

Answer 5

frontal process of the maxilla
lacrimal bone
lamina papyraceae of the ethmoid bone
lesser wing of the sphenoid bone
orbital plate of the palatine bone

Question 6

what comprises the floor of the bony orbit?

Answer 6

maxilla
zygoma
palatine bone

Question 7

what are the contents of the zygmonatico-orbital foramen?

Answer 7

maxillary n branch (V2)
zygomaticofacial branch (V2)
zygomaticotemporal branch (V2)

Question 8

what nerve is found in the supraorbital notch or foramen?

Answer 8

supraorbital branch (VI)

Question 9

so what are the contents of the optic canal and the superior orbital fissure in the posterior wall of the bony orbit?

Answer 9

optic nerve

III
IV
V1
VI

Question 10

the median wall of the bony orbit has what contents?

Answer 10

anterior ethmoidal foramen
-nasociliary branch of V1
-postieor ethmoidal n
posterior ethmoidal foramen
-nasocilary branch of V1
-anterior ethmoidal n
nasolacimal canal 
-tear duct (inferior nasal meatus)

Question 11

the floor of the bony orbit has what contents?

Answer 11

inferior orbital fissure

infraorbital canal that carries the infraorbital n

Question 12

what are the extra ocular muscles that move the globe? what are the innervations? what are their origins?

Answer 12

superior rectus CNIII 
medial rectus CNIII
inferior rectus CNIII
lateral rectus CNVI
levator palpebre superioris CNIII
inferior oblique CNIII
superior oblique CNIV

all tendinous ring of zinn except inferior oblique m, origin is maxilla of orbital floor

Question 13

this structure of the bony orbit is a flat gland on anterior surface of the eye?

Answer 13

lacrimal gland

Question 14

what are the cranial nerves found in the orbit?

Answer 14

II
III
IV
Vi
-frontal n
-lacrimal n
-nasociliary n (GSA)
Vii
-zygomatic n
-infraorbital n (GSA)
VI
VII

Question 15

arteries in the orbit?

Answer 15

branches of the internal carotid

• central retinal a
• opthalmic a
• -supraorbital branch
• -lacrimal branch

Question 16

veins in the orbit?

Answer 16

ophthalmic veins

• superior ophthalmic v
• inferior ophthalmic v

these veins drain into the cavernous sinus and receive drainage from facial veins