Cranial Nerves Flashcards Preview

Ophthalmology SOH > Cranial Nerves > Flashcards

Flashcards in Cranial Nerves Deck (19):
1

CNV1

Ophthalmic division of CNV

2

CNV1 - innervation

Upper eyelid
Conjunctiva
Cornea
Skin of the root/bridge/top of the nose

3

CNV2

Maxillary division of CNV

4

CNV2 - innervation

Skin of lower eyelid
Skin over maxilla
Skin of ala of nose
Skin/mucosa of upper lip

5

CNV3

Mandibular division of CNV

6

CNV3 - innervation

Skin over mandible and TMJ

7

CN III - where does it connect with the CNS

At the junction between the midline and the pons

8

CN III - how does it exit the cranial cavity?

Through the superior orbital fissure

9

CN II - contents

Central retinal artery and vein

10

What surrounds CN II

Subarachnoid space
- this space fills with CSF

11

What happens if CN III becomes damaged?

Damage of somatic motor innervation of the following:
MR, SR, IR, IO, LPS

12

CN III nerve palsy

Loss of function of the eye muscles which it innervates

13

CN III eye position

Look out (LR) and down (SO)
- these muscles are still functioning as they are not supplied by CN III

14

CN IV - location

Only nerve which arises from the dorsum of the brainstem

15

CN IV nerve palsy

Loss of function of the eye muscle it innervates: SO

16

When to suspect CN IV palsy

Pt has blurred vision going down the stairs and has trouble looking down

17

CN VI - function

Abduct the eye (supplies LR)

18

CN VI nerve palsy

Loss of function of the eye muscle it innervates: LR

19

CN VI eye position

Medial deviation of the eye