Cranial Nerves

Question 1

Which CNs have sensory axons?

Answer 1

CN I - Olfactory
CN II - Optic
CV VIII - Vestibulocochlear

Question 2

Which CNs have motor axons?

Answer 2

CN III - Oculomotor 
CN IV- Trochlear 
CN VI - Abducens 
CN XI - Spinal Accessory 
CN XII - Hypoglossal

Question 3

Which CNs have mixed (motor and sensory) axons?

Answer 3

CN V - Trigeminal
CN VII - Facial
CN IX - Glossopharyngeal
CN X - Vagus

Question 4

CN IV (Trochlear) is the only cranial nerve to do what?

Answer 4

Exit posteriorly

Question 5

What is the only sensory CN that does not synapse in the thalamus?

Answer 5

CN I - Olfactory

Question 6

The olfactory nerve is what modality(s)? What is it CN number?

Answer 6

Sensory only

CN I

Question 7

What is/are the nuclei of origin of CN III?

Answer 7

Nuclear complex (oculomotor nucleus and Edinger-Westphal nucleus) within the superior and inferior collicui 
CN III = Oculomotor

Question 8

CN III contains what modalities?

Answer 8

Somatic motor

Parasympathetic

Question 9

What does the oculomotor nerve innervate?

Answer 9

LPS 
SR
MR 
IR
IO 
Sphincter pupillae 
Ciliaris oculi

Question 10

The trochlear nerve comes from what nucleus and has the CN number..?

Answer 10

Trochlear nucleus

CN IV

Question 11

CN IV supplies what?

Answer 11

Superior oblique

Question 12

What does thee trochlear nerve curve around?

Answer 12

The cerebral peduncle

Question 13

What is the exit foraminae of the trochlear nerve/CN IV?

Answer 13

Superior orbital fissure

Question 14

CN VI innervates what?

Answer 14

Lateral rectus

Question 15

Name the nucleus the CN VI comes from?

Answer 15

Abducens nucleus

Question 16

What is the entry formainae of the abducent nerve?

Answer 16

Superior orbital fissure

Question 17

The hypoglossal nerve contains what modalities?

Answer 17

Motor only

Question 18

Where is the hypoglossal nucleus?

Answer 18

Forms a longitudinal column in the medulla adjacent to the midline

Question 19

Exit formainae of the hypoglossal nerve/ CN XII?

Answer 19

Hypoglossal canal

Question 20

What does CN XII supply?

Answer 20

Geniglossus
Hyoglossus
Styloglossus
Intrinsic tongue muscles

Question 21

The spinal accessory nerve innervates what with what kind of modality?

Answer 21

Motor to SCM and Trapezius

Question 22

Where does the spinal accessory nerve arise from?

Answer 22

accessory nucleus - column of nerve cells in the dorssoatera part of the ventral horn of the first 5 cervical segments

Question 23

Spinal accessory nerve = CN..?

Answer 23

CN XI

Question 24

What is the entry/exit formainae of CN XI?

Answer 24

Entry - foramen magnum

Exit - jugular foramen