6 - Head & Neck - Cranial Nerves Flashcards Preview

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Flashcards in 6 - Head & Neck - Cranial Nerves Deck (30):
1

Which 3 cranial nerves are purely special sensory?

CN I (Olfactory)
CN II (Optic)
CN VIII (Vestibulocochlear)

2

Which cranial nerves carry efferent autonomic fibres?

CN III
CN VII
CN IX
CN X

3

Which cranial nerves are purely motor?

CN III
CN IV
CN VI
CN XI
CN XII

4

Which cranial nerve supplies motor fibres to the ciliary muscles and the sphincter of the pupil?

CN III Oculomotor

5

Which cranial nerve supplies motor fibres to the superior oblique muscle of the eye?

CN IV Trochlear

6

Which cranial nerve supplies motor fibres to the lateral rectus muscle of the eye?

CN VI Abducens

7

Which cranial nerve supplies motor fibres to the muscles of mastication?

CN V Trigeminal

8

Which cranial nerve supplies motor fibres to the muscles of facial expression?

CN VII Facial

9

Which cranial nerve supplies sensory fibres for hearing?

CN VIII Vestibulocochlear

10

Which cranial nerve supplies general sensation to the pharynx, eustachian tube and middle ear cavity?

CN IX Glossopharyngeal

11

Which cranial nerve supplies motor fibres to the larynx, trachea, bronchial tree, heart and most of GI tract?

CN X Vagus

12

Which cranial nerve supplies motor fibres to Sternocleidomastoid?

CN XI Accessory

13

Which cranial nerve supplies motor to all intrinsic and extrinsic muscles of the tongue, except palatoglossus?

CN XII Hypoglossus

14

What parts of the head/neck have sensory innervation from the Trigeminal nerve (CN V)?

- Face
- Sinuses
- Teeth

15

A patient with a brainstem lesion in the pons may present with dysfunction of which cranial nerves?

CN V
CN VI
CN VII
CN VIII

16

Which cranial nerves exit the skull via the Internal Acoustic Meatus?

CN VII
CN VIII

17

Which cranial nerves exit the skull via the Superior Orbital Fissure?

CN III
CN IV
CN V1
CN VI

18

Which cranial nerves exit the skull via the Jugular Foramen?

CN IX
CN X
CN XI

19

Through which hole does CN XII (hypoglossus) exit the skull?

Hypoglossal canal

20

Through which hole does CN V2 exit the skull?

Foramen rotundum

21

Through which hole does CN V3 exit the skull?

Foramen ovale

22

Which cranial nerves pass through the cavernous sinus?

CN III
CN IV
CN V1
CN V2
CN VI

23

How may a cavernous sinus thrombosis present?

- Headache +/- Fever
- Periorbital oedema = exopthalmos (may affect sight)
- Ophthalmoplegia
- Diplopia
- Ptosis
- Mydriasis
- Pain/numbness around forehead/cheek

24

What is mydriasis? Lesion of which cranial nerve will cause this?

Dilation of the pupil of the eye
CN III Oculomotor

25

Why are CN I, II and XI considered unusual compared to the other cranial nerves?

CN I + II are direct continuations of the forebrain
CN XI contains fibres from the cervical spine

26

Which cranial nerves originate from the midbrain?

CN III
CN IV

27

Which cranial nerves originate from the pons?

CN V
CN VI
CN VII
CN VIII

28

Which cranial nerves originate from the medulla?

CN IX
CN X
CN XI
CN XII

29

Which cranial nerves pass into the orbit?

CN II
CN III
CN IV
CN V1
CN V2
CN VI

30

What gland lies in the center of the cavernous sinus?

Pituitary gland