07.2 Visual Pathways Flashcards
1
Q
What is the visual pathway from the eye to visual cortex?
A
Eye Optic Nerve Optic Chiasm Optic Tract Lateral geniculate nucleus Optic Radiations Visual Cortex
2
Q
Which fibres are responsible for temporal vision?
A
Nasal fibres
3
Q
Which fibres are responsible for nasal vision?
A
Temporal fibres
4
Q
What occurs if there is a lesion before the optic chiasm?
A
Monocular anopia
5
Q
What occurs if there is a lesion at the chiasm?
A
Bilateral temporal hemianopsia
6
Q
What occurs if there is a lesion at the optic tract?
A
Contralateral homonomous hemianopsia
7
Q
What occurs if there is a lesion at the optic radiations?
A
Quadrantinopsia
8
Q
How can macular sparing occur with hemianopsias?
A
In a posterior cerebral artery stroke.
Middle cerebral artery supplies the occipital pole so macula function remains intact.
