Visual Pathways

Question 1

DRAW OUT VISUAL PATHWAY NOW

Answer 1

Use this every time you get asked a question on visual pathways

Question 2

Describe where optic signals go after they pass along the optic tract

Answer 2

Pretectal nucleus
->
Edinger-Westphal nucleus (EWN)
->
gives signals to oculomotor nerve 
-> 
pupillary constriction/dilation

Question 3

For each of the following defects state where in the pathway is affected:

• unilateral
• bitemporal hemianopia
• homonymous
• macula sparing

Answer 3

Unilateral = before chiasm
Bitemporal hemianopia = optic chiasm
Homonymous = optic tract
Macula sparing = 1 hemisphere

Question 4

What is the name of the nuclei optic signals reach in the thalamus before become optic radiations into the visual cortex?

Answer 4

LGN

lateral geniculate nucleus

Question 5

What side of the brain processes signals from R eye?

Answer 5

L visual cortex

Question 6

What part of brain processes signals from superior visual fields?

What part of the brain processes signals from the inferior visual fields?

Answer 6

Temporal lobe = superior

Parietal = inferior

Superior processed lower in brain and inferior - higher in brain
Opposites