Cranial Nerves

Question 1

CN I (1)

Answer 1

Olfactory nerve

Question 2

CN II (2)

Answer 2

Optic nerve

Question 3

CN III (3)

Answer 3

Oculomotor nerve

Question 4

CN IV (4)

Answer 4

Trochlear nerve

Question 5

CN V (5)

Answer 5

Trigeminal nerve

Question 6

CN VI (6)

Answer 6

Abducens nerve

Question 7

CN VII (7)

Answer 7

Facial nerve

Question 8

CN VIII (8)

Answer 8

Vestibulocochlear nerve

Question 9

CN IX (9)

Answer 9

Glossopharyngeal nerve

Question 10

CN X (10)

Answer 10

Vagus nerve

Question 11

CN XI (11)

Answer 11

Accessory (Spinal) nerve

Question 12

CN XII (12)

Answer 12

Hypoglossal nerve

Question 13

Mnemonic for Cranial Nerve names

Answer 13

Oh 
Oh
Oh
To
Touch 
And 
Feel
Virgin
Girl's 
Vagina
Ah
Heaven

Question 14

Mnemonic for Cranial Nerve actions

Answer 14

Some
Say
Marry
Money
But
My
Brother
Says
Big
Brains
Matter
More

Question 15

What structure/bone does CN I exit through? Which section of the cranial fossa is this apart of?

Answer 15

CN I exits through the Crista Galli of the Ethmoid bone

- Anterior Cranial Fossa

Question 16

What is the function (1) of CN I?

Answer 16

Sensory: smell

Question 17

What structure/bone does CN II exit through? Which section of the cranial fossa is this apart of?

Answer 17

CN II exits through the Optic Canal of the Sphenoid bone

- Middle Cranial Fossa

Question 18

What is the function (1) of CN II?

Answer 18

Sensory: sight

Question 19

What structure/bone does CN III exit through? Which section of the cranial fossa is this apart of?

Answer 19

CN III exits through the Superior Orbital Fissure of the Sphenoid bone
- Middle Cranial Fossa

Question 20

What are the functions (3) of CN III?

Answer 20

• Motor: eyeball movement and upper eyelid movement

- Parasympathetic: pupillary light reflex

Question 21

What structure/bone does CN IV exit through? Which section of the cranial fossa is this apart of?

Answer 21

CN IV exits through the Superior Orbital Fissure of the Sphenoid bone
- Middle Cranial Fossa

Question 22

What is the function (1) of CN IV?

Answer 22

Motor: eyeball movement

Question 23

What is the name of CN V1? What structure/bone does CN V1 exit through? Which section of the cranial fossa is this apart of?

Answer 23

CN V1 is the Ophthalmic branch

• CN V1 exits through the Superior Orbital Fissure of the Sphenoid bone
• Middle Cranial Fossa

Question 24

What is the name of CN V2? What structure/bone does CN V2 exit through? Which section of the cranial fossa is this apart of?

Answer 24

CN V2 is the Maxillary branch

• CN V2 exits through the Foramen Rotundum of the Sphenoid bone
• Middle Cranial Fossa

Question 25

What is the name of CN V3? What structure/bone does CN V3 exit through? Which section of the cranial fossa is this apart of?

Answer 25

CN V3 is the Mandibular branch - CN V3 exits through the Foramen Ovale of the Sphenoid bone - Middle Cranial Fossa

Question 26

What are the functions (2) of CN V1?

Answer 26

- Sensory: facial sensation | - Sympathetic: pupillary dilation

Question 27

What is the function (1) of CN V2?

Answer 27

Sensory: facial sensation

Question 28

What are the functions (2) of CN V3?

Answer 28

- Motor: chewing | - Sensory: facial sensation

Question 29

What structure/bone does CN VI exit through? Which section of the cranial fossa is this apart of?

Answer 29

CN VI exits through the Superior Orbital Fissure of the Sphenoid bone - Middle Cranial Fossa

Question 30

What is the function (1) of CN VI?

Answer 30

Motor: eyeball movement

Question 31

What structure/bone does CN VII exit through? Which section of the cranial fossa is this apart of?

Answer 31

CN VII exits through the Internal Acoustic Meatus of the Temporal bone - Posterior Cranial Fossa

Question 32

What are the functions (6) of CN VII?

Answer 32

- Motor: facial expression, eyelid closing, stapedius muse (dampens sound) - Sensory: taste (anterior 2/3 of tongue) - Parasympathetic: lacrimation, salivation (submandibular glands, sublingual glands)

Question 33

What structure/bone does CN VIII exit through? Which section of the cranial fossa is this apart of?

Answer 33

CN VIII exits through the Internal Acoustic Meatus of the Temporal bone - Posterior Cranial Fossa

Question 34

What are the functions (2) of CN VIII?

Answer 34

- Sensory: hearing (cochlea), balance (vestibular apparatus)

Question 35

What structure/bone does CN IX exit through? Which section of the cranial fossa is this apart of?

Answer 35

CN IX exits through the Jugular Foramen of the Occipital bone - Posterior Cranial Fossa

Question 36

What are the functions (7) of CN IX?

Answer 36

- Motor: stylopharyngeus muscle (elevates pharynx and larynx) - Sensory: taste (posterior 1/3 of tongue), sensation of posterior 1/3 of tongue, tonsils, middle ear and pharynx - Parasympathetic: salivation (parotid gland)

Question 37

What structure/bone does CN X exit through? Which section of the cranial fossa is this apart of?

Answer 37

CN X exits through the Jugular Foramen of the Occipital bone | - Posterior Cranial Fossa

Question 38

What are the functions (10) of CN X?

Answer 38

- Motor: swallowing, elevation of palate, talking, coughing, gag reflex - Sympathetic: peripheral chemoreceptors (hypoxemia) - Parasympathetic: heart rate, GI peristalsis, sweating, vasovagal syncope

Question 39

What structure/bone does CN XI exit through? Which section of the cranial fossa is this apart of?

Answer 39

CN XI exits through the Jugular Foramen of the Occipital bone - Posterior Cranial Fossa

Question 40

What are the functions (2) of CN XI?

Answer 40

- Motor: turning head (sternocleidomastoid), shrugging (trapezius)

Question 41

What structure/bone does CN XII exit through? Which section of the cranial fossa is this apart of?

Answer 41

CN XII exits through the Hypoglossal Canal of the Occipital bone - Posterior Cranial Fossa

Question 42

What is the function (1) of CN XII?

Answer 42

- Motor: tongue movement

Question 43

Which muscle of the tongue is NOT innervated by CN XII?

Answer 43

Palatoglossus muscle is inverted by CN X (Vagus n.)