Vision - Serenas notes

Question 1

left visual field =

right visual field =

Answer 1

• right cortex

- left cortex

Question 2

central vision

Answer 2

tiny circle in middle of visual field

Question 3

monocular

Answer 3

part seen by one eye

Question 4

binocular

Answer 4

part seen by both eyes

Question 5

can both eyes see the majority of the visual field? What is it called?

Answer 5

yes

Binocular

Question 6

what does overlap of visual fields do?

Answer 6

depth perception

Question 7

which side can the eye see more of on the periphery?

Answer 7

ipsilateral

Question 8

what receptors are in the fovea?

how big is it?

Answer 8

cones only

small

Question 9

what receptors are outside of fovea?

Answer 9

rods

start to lose visual acuity

Question 10

what do cones do?
how big are the receptive fields?
and what does this lead to?

Answer 10

• encode colors
• have smaller receptive fields
• takes more receptive fields to put together recognizable shapes, faces, etc

Question 11

lower visual quarter field?

Answer 11

cuneus

fibers travel through parietal lobe directly to cuneus

Question 12

upper visual quarter field?

Answer 12

fibers travel rostrally and inferiorly to temporal lobe
-Meyers loop
then caudally to lingual gyrus

Question 13

What happens with lesion to radiations that loop around and head to lingual gyrus?

Answer 13

Superior quadratic hemianopia

Question 14

What happens with lesion to radiations that go straight to cuneus?

Answer 14

Inferior quadratic hemianopia

Question 15

if lose an optic nerve?

Answer 15

blind in that eye

Question 16

if damaged at optic tract?

Answer 16

would still be able to change diameter to adjust for intensity of light of depth of image

Question 17

just damage to meyers loop?

Answer 17

contralateral upper quarter field loss

Question 18

optic nerve damage?

Answer 18

ipsilateral monocular blindness

Question 19

optic chiasm damage?

infundibular stalk

Answer 19

bitemporal hemianopia

Question 20

optic tract damage?

Answer 20

contralateral homonymous hemianopia

Question 21

meyers loop damage?

Answer 21

contralateral upper homonymous quadrantanopia

Question 22

visual cortex sparing the central representation; occipital pole?

Answer 22

contralateral homonymous hemianopia with macular sparing

Question 23

anything behind the chiasm is a what?

Answer 23

contralateral visual field deficit

Question 24

each cortex is concerned only with ?

Answer 24

contralateral visual field info.