vision and balance

Question 1

optokinetic response

Answer 1

slow eye movement following a moving stimulus -> then quick saccade back

Question 2

small stimulus OKN

Answer 2

mainly elicits smooth pursuit -> via cortical inputs -> may not hold attention in some people

Question 3

big stimulus OKN

Answer 3

we prefer full field stimulus that involved the entire retina to elicit robust OKN

Question 4

vestibular ocular reflex

Answer 4

eyes compensatory movement resulting from our body moving through the environment

Question 5

when - enhance VOR

Answer 5

stabilise gaze on target in the world

Question 6

when - suppress VOR

Answer 6

stabilise gaze relative to self (e.g. reading something you hold while moving)

Question 7

vestibular system output

Answer 7

vestibular nerve

Question 8

otolith organs -> how does it work

Answer 8

when the body accelerates -> heavy crystals produce drag on hair cells -> triggers change in elec polarisation -> neural signal

Question 9

utricle

Answer 9

senses linear force in the horizontal head plane (L/R)

Question 10

saccule

Answer 10

positioned to register force in vertical head plane (Up/Down)