Visual Field Deficits Flashcards
1
Q
In a pre-chiasmal lesion which eye is affected?
A
one eye only ipsilateral
2
Q
What can cause a pre-chiasmal lesion?
A
- Optic neuritis
- Amaurosis fugax
- Optic atrophy
- Retrobulbar optic neuropathy
- Trauma
3
Q
What does a chiasmal lesion result in?
A
bitemporal hemianopia
4
Q
What are the causes of a chiasmal lesion?
A
- Pituitary adenoma
2. Suprasellar aneurysm
5
Q
What does a post chiasmal lesion result in?
A
homonymous contralateral
6
Q
What are the causes of post chiasmal lesion?
A
- Stroke
- Tumour
- Trauma
7
Q
What cranial nerve is CN III?
A
occulomotor
8
Q
What cranial nerve is IV?
A
trochlear
9
Q
What cranial nerve is VI?
A
abducens
10
Q
Which muscles does CNIII innervate?
A
- Superior rectus
- Inferior rectus
- Medial rectus
- Inferior oblique
11
Q
What muscle does CN IV innervate?
A
superior oblique
12
Q
What muscles does CN VI innervate?
A
lateral rectus
13
Q
What does occulomotor palsy result in?
A
- Ptosis
- Mydriasis
- Down and out
14
Q
What is Mydriasis?
A
dilated pupils
15
Q
What does trochlear palsy show as?
A
prevents eye moving inwards and down
