visual field defects

Question 1

if there is incongruous left homonymous hemianopia where will the defect be ?

Answer 1

i.e. Lesion of right optic tract

Question 2

if there is congruous left homonymous hemianopia where will the defect be ?

Answer 2

lesion of right optic radiation or occipital cortex

Question 3

if there is inferior homonymous quadrantanopia where would the lesion

Answer 3

inferior: lesion of the superior optic radiations in the parietal lobe
if homonomymou on the right - then on left parietal and vice versa

Question 4

if there is superioir homonymous quadrantanopia where would the lesion

Answer 4

superior: lesion of the inferior optic radiations in the temporal lobe (Meyer’s loop)
if homonymous on the right - then on the left temporal lobe vice versa

Question 5

if there is Bitemporal hemianopia

Answer 5

upper quadrant defect > lower quadrant defect = inferior chiasmal compression, commonly a pituitary tumour

lower quadrant defect > upper quadrant defect = superior chiasmal compression, commonly a craniopharyngioma