13 - neuro-opthalmology

Question 1

Question 2

Question 3

(ocular reflexes)

PLRs

1. test what CN?

(name what thing is affected)

2. vision loss and direct PLR deficit present
3. no vison loss, direct or consensual deficit present
4. vision loss, no PLR deficit

Answer 3

1. 2 and 3
2. afferent arm
3. efferent arm
4. cortical

Question 4

the menace resposne tests what nerves?

Answer 4

1. CN 2 and 7

(might be absent in young cause it’s a learned behavior)

Question 5

what nerves does the dazzle reflex test?

Answer 5

2 and 7

Question 6

what does the palpebral reflex nerves test?

Answer 6

5 and 7

Question 7

what CNs does the corneal reflex test?

Answer 7

5 and 7

Question 8

what is horner syndrome?

Answer 8

1. loss of sypathetic innervation to the eye

Question 9

1. what are three Cx of horner syndrome?

Answer 9

1. miosis, ptosis, enopthalmos, protrusion of nictitans

Question 10

horner’s syndrome

1. often idiopathic (> 50%) in dogs and cats

Question 11

horner’s syndrome

can be central, preganglionic, or postganglionic

1. how do they localize?

Answer 11

1. by clinical signs or pharmacologic testing (diffs preganglionic from postganglionic)