Lecture 4: Cranial Nerves

Question 1

Name all the cranial nerves and their number.

Answer 1

I Olfactory
II Optic
III Oculomotor
IV Trochlear
V Trigeminal 
VI Abducens
VII Facial
VIII Vestibulocochlear 
IX Glossopharyngeal 
X Vagus
XI Accessory
XII Hypoglossal

Question 2

The lateral rectus muscle of the eye is supplied by which cranial nerve? And what does it do?

Answer 2

Cranial nerve VI (Abducens). It moves the eye out to the side.

Question 3

The superior oblique muscle of the eye is supplied by which cranial nerve? What does it do?

Answer 3

Cranial nerve IV (Trochlear). Involved in looking down.

Question 4

Which cranial nerve supplies most eye muscles?

Answer 4

Cranial nerve III (Occulomotor).

Question 5

The Trigeminal nerve (V) supplies three sections of the face, what are they called from top to bottom?

Answer 5

1. Ophthalmic
2. Maxillary
3. Mandibular

Question 6

As well as providing motor input to the facial muscles, what does the Facial nerve (VII) do?

Answer 6

Receives sensory input from the anterior 2/3rds of the tongue (taste).

Question 7

The taste from the posterior 1/3rd of the tongue is innervated by which cranial nerve?

Answer 7

Glossopharyngeal (IX).

Question 8

Is the Vagus nerve involved in sensory or motor innervation?

Answer 8

Both!

Question 9

What does the Accessory cranial nerve (XI) do?

Answer 9

Turns head and moves shoulders.

Question 10

What does the Hypoglossal cranial nerve (XII) do?

Answer 10

Input to muscles of the tongue.