visual system anatomy

Question 1

pathway of light to occipital lobe

Answer 1

Light travels → retina → cones and rods → thalamus → lateral geniculate nuclei → primary visual cortex in occipital lobe

Question 2

main visual sensory input

Answer 2

v1

Question 3

photoreceptor cells

Answer 3

rods and cones

Question 4

bipolar cells

Answer 4

release glutamate and either activated/not activated depending on how much light travels

Question 5

ganglion cells

Answer 5

sends signals to brain

Question 6

modulation cells

Answer 6

light refraction

Question 7

receptive fields

Answer 7

area of retina where light induces a change in membrane potential - bipolar and ganglion cells have receptive fields with antagonistic centre surrounding organisation

Question 8

visual hemifield

Answer 8

region of space seen by each individual eye (l and r)

Question 9

binocular visual field

Answer 9

overlapped region of space seen by both eyes

Question 10

blood supply lateral geniculate nucleus

Answer 10

choroidal artery

Question 11

which layer of v1 receives most sensory input

Answer 11

4

Question 12

direction selective neurones function

Answer 12

analyse motion

Question 13

Meyer’s loop

Answer 13

temporal lobe lesion leads to visual field deficit in upper visual field

Question 14

dorsal visual pathway

Answer 14

analysis of motion and visual control of action

Question 15

ventral visual pathway

Answer 15

object recognition and colour perception