Visual field defects

Question 1

What structure is damaged in incongruous homonymous hemianopia?

Answer 1

Optic tract

Question 2

What is a common cause of optic tract damage?

Answer 2

MCA infarction

Question 3

What structure is damaged in congruous homonymous hemianopia?

Answer 3

Optic radiation

Occipital cortex

Question 4

What is a common cause of optic radiation damage?

Answer 4

MCA infarction

Question 5

What is a common cause of occipital cortex damage?

Answer 5

PCA infarction

Question 6

What visual field defect is produced by a temporal lobe lesion?

Answer 6

Superior homonymous quadrantanopia

due to lesions of the inferior optic radiations

Question 7

What visual field defect is produced by a parietal lobe lesion?

Answer 7

Inferior homonymous quadrantanopia

due to lesions of the superior optic radiations

Question 8

Which structure is involved in bitemporal hemianopia?

Answer 8

Optic chiasm

Question 9

What visual field defect is produced by a pituitary tumour?

Answer 9

Upper bitemporal hemianopia

due to inferior chiasmal compression

Question 10

What visual field defect is produced by a craniopharyngioma?

Answer 10

Lower bitemporal hemianopia

due to superior chiasmal compression

Question 11

What visual field defect is produced by an occipital cortex/lobe lesion?

Answer 11

Homonymous hemianopia with macula sparing