Cranial Nerves of the Brain

Question 1

What is the opening in the base of the skull for the olfactory nerve (CN I)?

Answer 1

Cribriform plate of ethmoid bone

Question 2

What is the opening in the base of the skull for the optic nerve (CN II)?

Answer 2

Optic foramen

Question 3

What is the opening in the base of the skull for the oculomotor nerve (CN III)?

Answer 3

Superior orbital fissure

Question 4

What is the opening in the base of the skull for the trochlear nerve (CN IV)?

Answer 4

Superior orbital fissure

Question 5

What is the opening in the base of the skull for the ophthalmic branch of trigeminal nerve (CN V1)?

Answer 5

Superior orbital fissure

Question 6

What is the opening in the base of the skull for the abducens nerve (CN VI)?

Answer 6

Superior orbital fissure

Question 7

What is the opening in the base of the skull for the facial nerve (CN VII)?

Answer 7

Internal acoustic meatus

Question 8

What is the opening in the base of the skull for the vestibulocochlear nerve (CN VIII)?

Answer 8

Internal acoustic meatus

Question 9

What is the opening in the base of the skull for the glossopharyngeal nerve (CN IX)?

Answer 9

Jugular foramen

Question 10

What is the opening in the base of the skull for the vagus nerve (CN X)?

Answer 10

Jugular foramen

Question 11

What is the opening in the base of the skull for the accessory nerve (CN XI)?

Answer 11

Jugular foramen

Question 12

What is the opening in the base of the skull for the hypoglossal nerve (CN XII)?

Answer 12

Hypoglossal foramen

Question 13

What is the opening in the base of the skull for the maxillary branch of trigeminal nerve (CN V2)?

Answer 13

Foramen rotunda

Question 14

What is the opening in the base of the skull for the mandibular branch of trigeminal nerve (CN V3)?

Answer 14

Foramen ovale

Question 15

What are the types of fibres carried in the CN I?

Answer 15

Special visceral sensory

Question 16

What are the structures found on the olfactory nerve pathway?

Answer 16

Olfactory bulb and tract

Question 17

What are the types of fibres carried in the CN II?

Answer 17

Special somatic sensory

Question 18

What are the types of fibres carried in the CN III?

Answer 18

General somatic motor

General visceral motor - parasympathetic

Question 19

What are the types of fibres carried in the CN IV?

Answer 19

General somatic motor

Question 20

What are the types of fibres carried in the CN VI?

Answer 20

General somatic motor

Question 21

Describe the pathway of CN II

Answer 21

1. Optic nerve
2. Optic chiasma
3. Optic tract
4. Lateral geniculate nucleus of thalamus
5. Optic radiation

Question 22

What are the branches off of the mandibular branch of the trig menial never (CN V3)?

Answer 22

Inferior alveolar nerve and lingual nerve

Question 23

What are the types of fibres carried in the CN V1?

Answer 23

General somatic sensory (scalp, forehead and nose)

Question 24

What are the types of fibres carried in the CN V2?

Answer 24

General somatic sensory (cheeks, lower eye lid, nasal mucosa, upper lip, upper teeth and palate)

Question 25

What are the types of fibres carried in the CN V3?

Answer 25

General somatic sensory (anterior 2/3 tongue, skin over mandible and lower teeth) and special visceral motor (muscle of mastication)

Question 26

What are the types of fibres carried in the CN VII?

Answer 26

General somatic sensory Special visceral sensory Special visceral motor General visceral motor

Question 27

What are the types of fibres carried in the CN VIII?

Answer 27

Special somatic sensory

Question 28

What are the types of fibres carried in the CN IX?

Answer 28

``` General somatic sensory Special visceral sensory Special somatic sensory Special visceral motor General visceral motor ```

Question 29

What are the types of fibres carried in the CN XI?

Answer 29

General somatic motor

Question 30

What are the types of fibres carried in the CN XII?

Answer 30

General somatic motor

Question 31

What plexus does CN X form part of and what does it innervate?

Answer 31

Oesophageal plexus and smooth muscle of oesophagus

Question 32

Name two branches of CN X that innervates the muscles of the layrnx

Answer 32

Superior laryngeal and recurrent laryngeal

Question 33

Which of the cranial nerves have a parasympathetic component?

Answer 33

CN III, VII, IX and X

Question 34

Which of the cranial nerves are attached directly to the brain?

Answer 34

CN I and II

Question 35

Which of the cranial nerves are attached to the midbrain?

Answer 35

CN III and IV

Question 36

Which of the cranial nerves are attached directly to the pons?

Answer 36

CN V

Question 37

Which of the cranial nerves are attached directly to the pontine-medulla junction?

Answer 37

CN VI, VII, VIII

Question 38

Which of the cranial nerves are attached to the medulla?

Answer 38

CN IX, X, XI and XII