Download Cranial Nerves: Review Info

Cranial Nerves:
Review Info
There are 12
pairs of cranial
nerves.
Olfactory I
Optic II
Oculomotor III
Trochlear IV
Trigeminal V
Abducens VI
Facial VII
Auditory
(vestibulocochlear
) VIII
Glossopharynge
al IX
Vagus X
Spinal
Accessory XI
Hypoglossal
XII
To help memorize each, a mnemonic is often used by
students such as . . .
"On Old Olympic Towering Tops A Finn And
German Viewed Some Hops"
Cranial Nerve:
Major Functions:
I Olfactory
smell
II Optic
vision
III Oculomotor
eyelid and eyeball
movement
IV Trochlear
innervates
superior oblique
turns eye
downward and
laterally
V Trigeminal
chewing
face & mouth
touch & pain
VI Abducens
turns eye laterally
VII Facial
controls most
facial expressions
secretion of tears
& saliva
taste
VIII
Vestibulocochlea
r
(auditory)
hearing
equillibrium
sensation
IX
Glossopharyngea
l
taste
senses carotid
blood pressure
X Vagus
senses aortic
blood pressure
slows heart rate
stimulates
digestive organs
taste
XI Spinal
Accessory
controls trapezius
&
sternocleidomastoi
d
controls swallowing
movements
XII Hypoglossal
controls tongue
movements
Continue on to Quizzer #1. . .identify cranial nerve locations
Or go to Quizzer #2. . .identify cranial nerve functions
Or go to cranial foramina Quizzer. . .identify structures passing
through major cranial formamina
Try These Links For Other Info & Images...
Cranial Nerve Dissection
...several views of cranial nerves in cadaver brain.
Cranial Nerve Pathways
...very good views of cranial nerve pathways in skull
Yale
...EXCELLENT drawings and descriptions of all cranial nerves...
Just the Basics
...good introductory descriptions & diagrams...
Cranial Nerves In Detail
...in depth material on cranial nerves with brief descriptions of how to test function of
each
A Little Cranial Nerve Trivia...
Do you know . . .
Which cranial nerve is the largest?
Which cranial nerve is the only one that exits the "posterior" side of the brainstem?
How many cranial nerves are responsible for eye movements?
What does "abducens" refer to?
Which cranial nerves carry gustatory (taste) information?
Which cranial nerve is the longest?
What two cranial nerves carry sensory information about blood pressure to the brain?
Which cranial nerve is responsible for pupillary constriction?
Answers below.
Which cranial nerve is the largest?
CN V (Trigeminal)
Which cranial nerve is the only one that exits the "posterior" side of the brainstem?
CN IV (Trochlear)
How many cranial nerves are responsible for eye movements?
Three: CN III (Oculomotor), IV (Trochlear), and VI (Abducens).
What does "abducens" refer to?
The abducens nerve carries motor impulses to the lateral rectus eye muscle which moves
the eye laterally causing abduction of the eye.
Which cranial nerves carry gustatory (taste) information?
CN VII (Facial), CN IX (Glossopharyngeal) and CN X (Vagus).
Which cranial nerve is the longest?
CN X (Vagus) which reaches from the medulla to the digestive and urinary organs.
What two cranial nerves carry sensory information about blood pressure to the brain?
CN IX (Glossopharyngeal) and CN X (Vagus).
Which cranial nerve is responsible for pupillary constriction?
CN III (Oculomotor).
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Originally created: Fall, 1997.
Last modified: Spring, 2005.
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