Eye Movements

Question 1

4 Types

Answer 1

Saccades, pursuit, vergence, Gaze-holding movement s

Question 2

control of saccades

Answer 2

cotrically - frontal eye fields

subcortically - superior colliculus

Question 3

nerves for muscles

Answer 3

occulomotor for all except:
lateral rectus - abducens
superior oblique - trochlear

Question 4

inferior oblique

Answer 4

EXTERNALLY rotates the eye UP and OUT

Question 5

superior oblique

Answer 5

INTERNALLY rotates the eye DOWN and OUT

Question 6

lateral rectus

Answer 6

away from centre of face

Question 7

medial rectus

Answer 7

towards nose

Question 8

superior rectus

Answer 8

up

Question 9

inferior rectus

Answer 9

down

Question 10

VO reflex

Answer 10

1. rotate head right
2. fluid moves in horizontal canals - vestibular hair displacement
3. (L) abducens nucleus therefore (L) rectus contracts
4. signals via medial longitudinal fasiculus to R occolumotor nucleus to move R medial rectus

Question 11

Saccade

Answer 11

quick, jerky movement of eyes to focus on important points in the visual scene