dissection - the orbit Flashcards
colour of sclera
white
can be yellow due to jaundice
superor rectus nerve supply and actions
CNIII
elevates
moves medially
intorts
lateral rectus nerve supply and actions
abducens
moves laterally
medial recturs
ocular motor
moves medially
inferior rectis
III
moves downwards
medially
extorts
superior oblique
trochlear
depress
laterally
intorts
inferior oblique
III
elevates
laterally
extorts
Nerve supply of levator palpebral superiororis
CN III
superior cervital ganglion fibres
what happens if nerve supply is lost to elevator palpebral superiors
superior cervical ganglion (sympathetic)
pupal constricted
upper eyelid droop
(horners syndrome)
CNIII
drping eyelid
dilated pupil
Clinical test for occular motor
track pen torch across visual frields
damage to ocular motor patient complaint
ptosis (drooping of upper eyelid)
double vision
damage to ocular motor effects
abducted in primary position
defective in adduction
elevation and depression
trochlear clinical test
track pen torch across visual field
damage to trochelae effects
limitation of depression
patients complaint on damage of trochelar
diplopia
adbucens clinical test
track pen tourch across visual feilds
damage to adbudents effects
adducted in primary position
patient somcpolaint of abducens
diplopia
pupillary reflexes
pupil constricts upon bright lights
afferent limb of pupil reflex
optic nerve
efferent limb for pupil reflex closing eye
parasympathetic fibres in ocular motor
blow out fractre
globe pushed posteirorally
wall of orbit breaks
which wall of the orbit is most likey to be dames in blow out fracture
floor or orbit
le fort III fracuture and what might be damaged
craniofacial separation
orbital floor, maxillary artier, lacrimal apparatus
venous connections of the cavernous sinus
facial vein
supraorbital
infraorbital
what does cavernous sinus thrombosis lead to
intracranial infection
