Cranial Nerves Basics

Question 1

CN 1

Answer 1

Olfactory Nerve - Olfactory Sensory Neuron

Olfaction = Sense of Smell

Originates in Cerebrum

Question 2

CN 2

Answer 2

Optic Nerve - Vision
Sensory

Originates in cerebrum

Question 3

CN 3

Answer 3

Oculomotor - Motor/ Eye movement
(autonomic functions: eyelid elevation, pupillary constriction, Lens Accommodation)

Originates Midbrain

Question 4

CN 4

Answer 4

Trochlear: Motor/ eye movement

Originates in Midbrain

Question 5

CN 5

Answer 5

Trigeminal - Both Sensory and Motor (
afferent and efferent)

-Sensory: Facial sensation v1 v2 v 3 Tongue (ant 2/3

-Motor: Mastication (biting/Chewing)

Originates in Pons

Question 6

CN 6

Answer 6

Abducens Motor/Eye movement

originates in Pontomedullary Region

Question 7

CN 7

Answer 7

Facial-Sensory and Motor

Sensory: Taste (ant 2/3)

Motor: facial expression, Eyelid closing,
salivation, laceration / tears

Originates Pontomedullary Region

Question 8

CN 8

Answer 8

Vestibulocochlear -Balance & Hearing (sensory)
Auditory Nerve

Originates in Pontomedullary Region

Question 9

CN 9

Answer 9

glossopharyngeal- Motor and Sensory

Sensory: taste/sensation on tongue, Sensation of Pharynx, chemo baroreceptors

Motor: Swallowing and Salivation

Originates in medulla oblongata

Question 10

efferent means?

Answer 10

Motor

Question 11

afferent means?

Answer 11

Sensory

Question 12

CN 10

Answer 12

Vagus-Longest nerve!

Sensory: Skin around ear, pharynx, larynx thorax and abdomen, taste/sensation of epiglottis.

Motor: Swallowing, Speech, Coughing

(autonomic/Parasympathetic

originates in medulla oblongata

Question 13

CN 11

Answer 13

Accessory “spinal” Nerve

Motor: Shoulder Shrugging, head turning

Medulla Oblongata

Question 14

CN 12

Answer 14

Hypoglossal nerve

Motor: movement of most of the muscles in your tongue.

Originates Medulla Oblongata

Question 15

Cranial Nerve Mnemonic

Answer 15

O- ON Olfactory Some
O- OCCASION Optic Say
O- OUR Oculomotor Marry
T- TRUSTY Trochlear Money
T- TRUCK Trigeminal But
A- ACTS Abducens My
F- FUNNY Facial Brother
V- VERY Vestibulocochlear Says
G- GOOD Glossopharyngeal Big
V- VEHICLE Vagus Brains
A- ANY Accessory Matter
H- HOW Hypoglossal More