Vision - Serenas notes Flashcards
left visual field =
right visual field =
- right cortex
- left cortex
central vision
tiny circle in middle of visual field
monocular
part seen by one eye
binocular
part seen by both eyes
can both eyes see the majority of the visual field? What is it called?
yes
Binocular
what does overlap of visual fields do?
depth perception
which side can the eye see more of on the periphery?
ipsilateral
what receptors are in the fovea?
how big is it?
cones only
small
what receptors are outside of fovea?
rods
start to lose visual acuity
what do cones do?
how big are the receptive fields?
and what does this lead to?
- encode colors
- have smaller receptive fields
- takes more receptive fields to put together recognizable shapes, faces, etc
lower visual quarter field?
cuneus
fibers travel through parietal lobe directly to cuneus
upper visual quarter field?
fibers travel rostrally and inferiorly to temporal lobe
-Meyers loop
then caudally to lingual gyrus
What happens with lesion to radiations that loop around and head to lingual gyrus?
Superior quadratic hemianopia
What happens with lesion to radiations that go straight to cuneus?
Inferior quadratic hemianopia
if lose an optic nerve?
blind in that eye
if damaged at optic tract?
would still be able to change diameter to adjust for intensity of light of depth of image
just damage to meyers loop?
contralateral upper quarter field loss
optic nerve damage?
ipsilateral monocular blindness
optic chiasm damage?
infundibular stalk
bitemporal hemianopia
optic tract damage?
contralateral homonymous hemianopia
meyers loop damage?
contralateral upper homonymous quadrantanopia
visual cortex sparing the central representation; occipital pole?
contralateral homonymous hemianopia with macular sparing
anything behind the chiasm is a what?
contralateral visual field deficit
each cortex is concerned only with ?
contralateral visual field info.