ANAT 6 Control of Eye Movement

Question 1

eye movement systems

normal eye movements require?

4 things

medial longitudinal fasciculus use what to achieve what?

Answer 1

Question 2

supranuclear gaze and control systems

4

which are conjugate? disconjugate?

what are they? ex?

s

s

v

v

Answer 2

Question 3

Question 4

how we look at a face

what do we focus on?

Answer 4

fill in the parts around

Question 5

saccadic system horizontal

what is it?

sensory info start from? 2? situation for each?

will then go where? AKA (ips/cont)

then? ips/cont for these which has a middle path? what is it?

look towards or away?

Answer 5

Question 6

saccadic system vertical

what is it?

what input starts? (each for what)

then goes to? then through?

vertical gaze by?

tumor where mess with this?

downgaze by?

tumor where?

Answer 6

Question 7

volitional saccadic eye movements

pathway review

what direction look towards?

Answer 7

Question 8

voluntary and reflex saccadic eye movements

what contributes to reflex?

ex?

Answer 8

Question 9

what area control cells for saccades?

for saccadic movements there nee to be what? via what? the moves eyes where?

then you need wht type of firing? via? for what to happen?

once you have done this what happens to continue looking where you want?

control systems universal?

Answer 9

Question 10

where are these located?

Answer 10

notice first parts are same as pathway

Question 11

location of horizontal and vertical gaze control centers?

horizontal?

Answer 11

Question 12

saccadic movements

test for it by?

pathology of the frontal gaze center

types? 2 what defect for either?

d-

s-

Answer 12

destructive car crash look at

seizure annoy look away

Question 13

smooth pursuit

what is it?

start where? then travel to where? (specifically)

then (on diagram) next to?

then where?

difference between horizontal and vertical?

Answer 13

Question 14

if in left hemisphere the neyes move?

Answer 14

Question 15

optokinetic

what is it?

what is the pathway?

when reach limit of visual field?

when this happens what happens?

requires intact what eye field?

Answer 15

Question 16

smooth pursuit movements

testing? 2

pathology- lesion of where will cause loss? towards what side? in optokinetic nystagmus?

Answer 16

Question 17

vestibular-ocular system

what is it?

start where? (how is this system activated? which side is activated) leave via? goes to? then? difference for horizontal and vert?

Answer 17

notice to the medial rectus it is through MLF

Question 18

vestibular-ocular system

head right eyes go where?

pathway review

Answer 18

Question 19

vestibualr-ocular movements

testing? (2 named tests)

what are the tests?

d-

i- patients have to be what?

pathology- in comatose patient with dysfunction at level of brainstem what is presented?

Answer 19

Question 20

INO? what is it? (2)

resulting from a lesion where? (2)

what can still happen?

Answer 20

Question 21

three different lesions that affect looking left and right?

for these in example its left. what is normal whats not?

internuclear opthalmoplegia

CN VI nucleus lesion

CN VI nerve palsy

Answer 21

Question 22

pathway of near reflex

3 things that it allows to happen?

follows what pathway? axon to what cortex? this send axon where? (2) then act on? (2)

Answer 22

Question 23

vergence

test- how do you test?

pathology? name? (cause) what is present on exam?

Answer 23