Visual pathways Flashcards
(25 cards)
what are the destinations for the optic tract
Lateral geniculate nucleus pretectal nuclei superior colliculus hypothalamus reticular formation
what is the location for thalamic relay nuc for vision
lateral geniculate nucleus
what is the definition of a visual field
view seen by eyes w/o moving head
what is monocular vision
visual field of 1 eye
what makes up the optic radiation
axons from Lateral geniculate nucleus
what are the axons called that carry info of superior visual field
meyer’s loop
where do the LGN fibers project to
visual (striate) cortex BA17
Is the meyers loop more anterior inferior or posterior superior of the optic radiations
anterior inferior
What anatomically separates the inferior/superior visual fields
calcarine sulcus
What nuclei control the pupillary light reflexes
pretectal nuclei
describe the pupillary light reflex
retina to optic n to pretectal to edinger westphal to oculomotor n to pupillary sphincter
What controls the constriction of pupils
oculomotor, parasympathetic
what controls the dilation of pupils
sympathetic via superior cervical ganglion
What coordinates the visual grasp reflex
superior colliculus
what tract is activates by visual stimulus
tectospinal tract
Where is the suprachiasmatic nucleus
hypothalamus
what does the suprachiastmatic nucleus control
circadian rhythms
What are the higher order processing areas of primary visual Cx
18 and 19
What visual information is processed in the parietal region/dorsal pathway
movement and where is it
what visual information processed in the temporal region/ventral pathway
color and what is it
What type of blindness will a patient get with a lesion in the optic nerve
blindess in ipsi eye
what type of blindness if pituitary impedes on optic chiasm
bitemporal hemianopia
what blindness if lesion an optic tract
homonymous hemianopia
what can cause quandrant anopia
lesion of one nasal retina path
