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Flashcards in Block 11 Deck (166)
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1

A vision condition in which a person cannot align both eyes simultaneously

Strabismus

2

4 types of neurological strabismus

Cranial Nerve Palsies
Neurological Diseases
Posterior Fossa Tumors or Malformations
Raised Intracranial Pressure

3

Symptoms of strabismum

Double vision
Blurry vision
Reduced peripheral vision
HA
Dizziness

4

All 3 of the CN palsies can be caused by

Vasculopathic
Tumor

5

Aneurysms can cause which type of strab

3rd nerve palsy

6

Which type of strab is usually caused by trauma or congenital

4th nerve palsy

7

Which type of strab is caused by cranial pressure

6th nerve palsy

8

What muscles are affected in CN 3 palsy

SR
MR
IR
IO
Sup palpebral levator muscle

9

Which way will the eye be in a CN 3 palsy

Down and out
Ptosis
Dilated pupil
No accommodative response

10

What nucleus can be affected in a 3rd nerve palsy

Edinger-Westphal nucleus

11

Which etiology of CN 3 palsy is pupil sparing

Ischemic/vascular

12

Most common arteries involved in CN3 palsy with an aneurysm cause

Posterior communicating a.
(Also internal carotid a. Or basilar a.)

13

Muscle affected in CN4 palsy

SO

14

Which way will the eye move in a CN4 palsy

Up and in
Usually with a head tilt

15

Which way will the head tilt in CN4 palsy

To opposite side of palsy
(Rt tilt --> LSO palsy)

16

Longest intracranial pathway is with which nerve

CN 4

17

CN4 palsy is often associated with what type of syndrome

Horner's

18

Most common causes of acquired isolated CN4 palsy

1- idiopathic
2- head trauma
3- microvasculopathy (diabetes, HTN, atherosclerosis)

19

Which muscle is affected in CN6 palsy

LR

20

Which way does the eye turn in LR palsy

Turns in
(Compensatory head turn)

21

Which way does the head turn in LR palsy

Towards affected eye
(OD in --> turn to right)

22

CN6 has a long external course through the cranium, making it susceptible to

Injury
Inc ICP
Mastoid infection
Skull fracture
Tumors

23

Most commonly affected oculomotor nerve in adults

CN 6

24

Most commonly affected oculomotor nerve in kids

CN 4

25

Second most commonly affected oculomotor nerve in children

CN 6

26

Which muscle is more affected by ischemia than other EOMS and why

LR bc it only has 1 ant ciliary a., the rest have 2

27

If the cavernous sinus is affected, what nerves are affected

3, 4, 5-1, 5-2, 6

28

Main cause of a cavernous sinus palsy

Neoplasm

29

Orbital apex syndrome involves which nerves

3, 4, 5-1, 6

30

Which multiple nerve palsy is horners syndrome seen in

Cavernous sinus
Orbital apex syndrome