Cranial Nerves

Question 1

Where are cranial nerves visible?

Answer 1

Ventral aspect of brain

Question 2

What are the cranial nerves?

Answer 2

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

Question 3

What nerves are sensory?

Answer 3

CN I
CN II
VIII

Question 4

What neves are motor?

Answer 4

CN III
CN IV
CN VI
CN XI
CN XII

Question 5

What nerves are motor and sensory?

Answer 5

CN V
CN VII
CN IX
CN X

Question 6

Where does CN I exit cranial cavity?

Answer 6

Cribriform plate of ethmoid

Question 7

Where does CN II exit cranial cavity?

Answer 7

Optic canal

Question 8

Where does CN III exit cranial cavity?

Answer 8

Superior orbital fissure

Question 9

Where does CN IV exit cranial cavity?

Answer 9

Superior orbital fissure

Question 10

Where does CN VI exit cranial cavity?

Answer 10

Superior orbital fissure

Question 11

Where does CN V exit cranial cavity?

Answer 11

Foramen rotundum, Foramen Ovale, Superior orbital fissure

Question 12

Where does CN VII exit cranial cavity?

Answer 12

Internal acoustic meatus

Question 13

Where does CN VIII exit cranial cavity?

Answer 13

Internal acoustic meatus

Question 14

Where does CN IX exit cranial cavity?

Answer 14

Jugular Foramen

Question 15

Where does CN X exit cranial cavity?

Answer 15

Jugular Foramen

Question 16

Where does CN XI exit cranial cavity?

Answer 16

Jugular Foramen

Question 17

Where does CN XII exit cranial cavity?

Answer 17

Hypoglassal canal

Question 18

What nerves are somatic?

Answer 18

CN III
CN IV
CN VI
CN XII

Question 19

What nerves are parasympathetic?

Answer 19

CN III
CN VII
CN IX
CN X

Question 20

What nerves are branchiomotor?

Answer 20

CN V
CN VII
CN IX
CN X
CN XI

Question 21

Where do you find somatic motor?

Answer 21

Skeletal muscle somites

Question 22

Where do you find visceral motor (parasympathetic)?

Answer 22

Glands/smooth muscle

Question 23

Where do you find Brachiomotor?

Answer 23

Jaw, face, pharynx, larynx, head/shoulders

Question 24

What is the only site in the CNS where the cell bodies of the primary afferent neurons live inside the CNS?

Answer 24

Mesencephalic nucleus

Question 25

What are the three complex cranial nerves?

Answer 25

Facial, Glossopharyngeal and Vagus

Question 26

Function of facial nerve?

Answer 26

Motor (muscles of facial expression)

Parasympathetic innervation to pterygopalatine and submandibular ganglia

Taste (anterior 2/3rd of tongue)

Question 27

Function of glossopharyngeal nerve?

Answer 27

Tactile sense, pain and temperature sense from the posterior tongue

Taste (posterior 1/3rd of tongue)

Visceral sensation from carotid sinus and carotid body

Question 28

Function of vagus nerve?

Answer 28

Parasympathetic innervation to ganglia serving thoracic and abdominal viscera

Motor

Tactile sense, pain, temperature sense form the lower pharynx, larynx and oesophagus

Visceral afferents from aorta, lung and gut