Head #2 Flashcards
(29 cards)
where is the base of the orbits
on the outside
where is the apex of the orbits
on the inside
the medial walls of the two orbits are seperated by what
ethmoidal sinuses and upper parts of the nasal cavity
what angle are the lateral walls of the orbits
90 degrees
the axis of the orbits diverge at what angle
45 degrees
what controls light exposure
eyelids
what position the eyeballs and raise the superior eyeball
extracoular muscles
what surronds the eyeballs and muscles
orbital fascia
what is the mucus membrane that lines the eyelid anterior and most of the lacrimal apparatus
conjunctiva
what lubricates the eye ball
conjunctiva
where does the lacrimal gland sit
in the lacrimal fossa
what bones help to form the medial wall of the orbits
ethmoid
lacrimal
sphenoid
frontal
what is easier to break the lateral or the medial wall of the orbits
the medial wall
inferior wall of the medial orbit? of the lateral
maxilla
zygomatic
lateral wall of the orbit is formed by what
zygomatic bone and greater wing of the sphenoid
where the apex of the orbit specifically
the optic canal
what can come out of the superior orbital fissure
CSF
what are the bones that form the orbit lined by
periorbita
any infection of the periorbita can spread where
anywhere
where is the thinnest skin of the body
on the eyelid
what is significant swelling and hemorrhage into the into the eyelids and extravasation of blood into periorbital skin
ecchymosis
ecchymosis is common in who
boxers
fractures of the orbits usually occur where
at the sutures between the bones that form the orbital margin
a blow to the eye can displace the orbital walls and what is this called
a blowout fracture
