Cranial nerves Flashcards
how do you say tunnel vision because of how it happens
bitemporal hemianopia
what is the outside view called
temporal view
what is the inside view called
nasal view
which 3 cranial nerves motor innervate the eyes
3, IV, VI
occulomotor, trochlear (hooks back on itself like a pulley) , abducent
what are the 6 eye muscles
4 x rectus
2 x oblique (sup and inf)
which muscles does occulomotor innervate
sim rectus, inf oblique
AND levator palpabrae superioris
simriol (OcculoMOSTor)
which nerve innervates lateral rectus
abducent (abducts eye)
therefore, which nerve innervates superior oblique (think what it does)
trochlear (goes back on itself)
how do you test motor eye nerves
H test. Always go sideways then up and down
which 2 muscles work togetehr to elevate eye
sup rectus and inf oblique
which 2 muscles work togetehr to depress eye
inf rectus and sup oblique
which muscles move the eyes right and left
med and lat rectus
if III palsy, what do you see
droopy eyelid, dilated pupil, down and out pupil
what is a ciliary body
changes shape of lense. contracted near vision, relaxed, distant vision
what parasympathetic innervation does III provide
constrictor pupillae, cilliary bodies
how do you find trochlear nerve
only one at the back of brainstem
what do no cranial nerves have
sympathetic fibres
symptom of IV palsy
diplopia looking downwards - trouble with stairs
which bit of trigeminal has motor fibres, what do they innervate
mandibular - muscles of masticatino
does trigeminal mostly do
sensory, face ->DCML
what is the venous drainage in the skull
sinuses not veins
what is weird about cavernous venous sinus
has ICA and III, IV and V1 and V2 in it
where do the 3 eye motor nerves exit the skull
superior orbital fissure
where does trigeminal nerve exit the skull
Superior orbital fissure
foramen rotundum
Foramen ovale
