QuestionSBA
QuestionChoice
Lesions in the optic radiation affect the contralateral side, due to the crossing over of fibres at the optic chiasm, so we know damage to the left side will affect the right side of vision. The acronym to remember which quadrant is affected is ‘PITS’ (parietal inferior, temporal superior).
10027066
a
Right inferior quadrantanopia
QuestionChoice
Right superior quadrantanopia would arise from lesions to the left optic radiation in the temporal lobe.
10027067
b
Right superior quadrantanopia
QuestionChoice
Lesions in the occipital cortex result in contralateral homonymous hemianopia with macular sparing. If the homonymous hemianopia did not have macular sparing, this would suggest a lesion of the optic tract.
10027068
c
Right homonymous hemianopia with macular sparing
QuestionChoice
Lesions in the optic radiation affect the contralateral side, due to the crossing over of fibres at the optic chiasm, so left-sided visual defects are caused by lesions in the right optic radiation.
10027070
e
Left superior quadrantanopia
QuestionChoice
Lesions in the optic radiation affect the contralateral side, due to the crossing over of fibres at the optic chiasm, so left-sided visual defects are caused by lesions in the right optic radiation.
10027069
d
Left inferior quadrantanopia
Concept
Chapter
2693
4508
Anatomy of visual pathways
Topic
152
Neuroscience
17811
A 64-year-old man had an ischaemic stroke, leading to damage to his left optic radiation in the parietal lobe.

What visual field defect would this man most likely experience?
a