m: eye movement Flashcards
Abducen number
CN VI
Trochlear number
CN IV
Oculomotor number
CN III
Lateral rectus controlled by
CNVI (abducens)
Superior oblique controlled by
CN IV (Trochlear)
what oculomotor control
everything else
where is oculomotor nuclei
midbrain
wheres trochlear nerves
rostal pons
wheres abducens nuclei
caudal pons
whats superior to inferior nuclei
oculomotor
trochlear
abudcens
how do occulomoto, track and Abd nuclei communicate
ascending MLF
MLF
coordinated eye movement
are the nuclei anterior ro posterior
psoteiro
vertical gaze center where
midbrain reticular formation
pretectal
horizontal gaze center
pons
PPRF
whats superior horizontal or veercial gazecenter
vert
whats needed for horizontal gaze to right
same side CNVI or that side won’t go
what does abudction of ipsilateral eye
abducens
saccades
rapid eyes to different fixed points
saccades styles
reflexive
volitional
reflexive saccades
response to external cue
volitional saccades
voluntary
saccadic eye movement initiatives by
cortical or subcortical areas
cortical ignition of saccades:
frontal eye fields
subcortical inanition of saccades
superior colliculi
reflexive saccade to right
opposite superior colliculus (to the side of gaze)
opposite horizontal gaze centre starts (to super colliuculU)
what makes the descending MLF
medial lateral vestibulospinal tracts
where does descnending MLF arise from
vestibular nuclei
whats descending MLF influence
mm tone balance postrutre position head neck
wheres vestibular nuclei
under abducens ones
area that has highest visual acuity
fovea
what VOR do
vestibule ocular relfex
stabilze image
VOR
oppose side vest nuclei goes across to abducens who does its thing
do eyes move with head
no opposite
