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Flashcards in Cranial Nerve Examination Deck (39)
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1

What is it useful to do when examining an older child?

Consider each area of the nervous system individually - the cranial nerves, cerebellum, upper limb, lower limb, and gait

2

What is cranial nerve I (1)?

Olfactory

3

What is cranial nerve II (2)?

Optic

4

What is cranial nerve III (3)?

Oculomotor

5

What is cranial nerve IV (4)?

Trochlear

6

What is cranial nerve V (5)?

Trigeminal

7

What is cranial nerve VI (6)?

Abducens

8

What is cranial nerve VII (7)?

Facial

9

What is cranial nerve VIII (8)?

Vestibulocochlear

10

What is cranial nerve IX (9)?

Glossopharyngeal

11

What is cranial nerve X (10)?

Vagus

12

What is cranial nerve XI (11)?

Accessory

13

What is cranial nerve XII (12)?

Hypoglossal

14

What does CN 3 innervate?

- Ciliary muscles
- Sphincter of pupils
- All external muscles of eye except superior oblique and lateral rectus

15

What does CN 4 innervate?

Superior oblique muscle

16

What does CN 5 innervate?

Sensory to face, sinuses, and teeth

17

What does CN 6 innervate?

Lateral rectus muscle

18

What does CN 7 innervate?

Muscles of face

19

What does CN 7 innervate via the intermediate nerve?

- Motor to submandibular, sublingual, and lacrimal glands
- Taste to anterior 2/3 of tongue
- Sensory to soft palate

20

What does CN 8 divide into?

- Cochlear nerve
- Vestibular nerve

21

What does CN 9 innervate?

- Taste to posterior 1/3 of tongue
- Sensory to tonsils, pharynx, and middle ear
- Motor to stylopharyngess, upper pharyngeal muscle, and parotid gland

22

What does the CN 10 innervate?

- Motor to heart, lungs, palate, pharynx, larynx, trachea, bronchi, and GI tract
- Sensory to heart, lungs, trachea, bronchi, larynx, pharynx, GI tract, external ear

23

What does CN 11 innervate?

- Sternocleidomastoid
- Trapezius

24

What does CN 12 innervate?

Tongue

25

How is CN 1 tested?

Asking patient if they have noticed any change in their sense of smell
If test done, each nostril in turn

26

How is CN 2 tested?

- Visual acuity
- Visual fields
- Pupillary reflexes
- Fundoscopy

27

What pupillary reflexes should be tested?

Direct and consensual responses to lift, then accommodation

28

How should CN 3, 4, and 6 be tested?

Ask child to fix and follow on an object (light from pen torch is best in children)

29

How should the motor component of CN 5 be tested?

- Ask child to open their mouth whilst you try and close it
- Clench teeth together and feel muscle mass of masseters

30

What will be found when you ask the child to open their mouth whilst you try to close in if there is a CN 5 lesion?

It will deviate to the side of weakness