QuestionSBA
QuestionChoice
This is correct. The temporal lobe contains the inferior optic radiating fibres (also known as Meyer's loop). The Meyer loop gives rise to vision in the contralateral superolateral visual field. Therefore, damage to the temporal lobe can cause damage to Meyer's loop, causing contralateral homonymous superior quadrantanopia (loss of vision in the contralateral superolateral visual field). This is also known as a pie-in-the-sky field cut.
10004251
a
Contralateral homonymous superior quadrantanopia
QuestionChoice
This is incorrect. Contralateral homonymous hemianopia with macular sparing occurs due to lesions or damage in the visual cortex located in the occipital lobe (calcarine sulcus). Partial damage to the visual cortex will spare the macula as the macula is represented in a very large region of the cortex and is spread out. This is often caused by a stroke or a tumour.
10004254
d
Contralateral homonymous hemianopia with macular sparing
QuestionChoice
This is incorrect. Contralateral homonymous hemianopia is due to damage to the optic nerve after the optic chiasm i.e. in the optic tract. Damage to the optic tract results in the whole half of the contralateral field being lost in both eyes. This is usually caused by a tumour or a stroke.
10004253
c
Contralateral homonymous hemianopia
QuestionChoice
This is incorrect. A central scotoma is a blurry, grey/black or blind spot in the middle of the vision. This is usually due to lesions of the optic nerve itself or the macula.
10004255
e
Central Scotoma
QuestionChoice
This is incorrect. Bitemporal hemianopia is caused by damage to the optic chiasm. This is commonly due to compression of the optic chiasm from tumours (frequently pituitary tumours), aneurysms or lesions over the optic chiasms. This is because the fibres that give rise to the temporal half of vision on both eyes cross over at the optic chiasm.
10004252
b
Bitemporal hemianopia
Concept
Chapter
2693
4256
Visual defects
Topic
141
Neurology
13397
A 31-year-old man with drug-resistant focal, impaired awareness seizures is scheduled to undergo a left temporal lobectomy for hippocampal sclerosis.

What visual defect could be seen postoperatively?
a