Pre-Lab
Lab #11: Nervous System Part 2 (Cranial Nerves)
This Pre-Lab should be printed and completed by the start of lab (week 12: November 11-15)
There is no partial credit on pre-labs. For a pre-lab to be complete, there cannot be any blanks!
Learning Objectives (BE ABLE TO ANSWER/DO THESE THINGS FOR YOUR PRACTICAL)
❑ List the 12 cranial nerves by name and number
❑ List and identify each cranial nerve cranial passage (path through the skull)
❑ Identify where each cranial nerve exits the brain
❑ List the nerve fibers found in each cranial nerve (is it motor, sensory, or both?)
❑ State the function of each cranial nerve
Reminders
❑ Connect Quiz #11 (Nervous System Part 2) due Sunday, November 17th by 11:59 PM EST
❑ Lab Practical #2 November 18-22nd
❑ Paper is due Sunday, November 24th by 11:59 PM EST
❑ No labs Week 14 (November 25-29th)
❑ Pre-lab #12 is due at the start of lab for week 15 (December 2-6); We are doing a dissection this week so
come prepared with lab coat, closed toed shoes, and eye protection.
1
Cranial Nerves
Label the images with the
correct cranial nerve.
Olfactory (I)
Optic (II)
Oculomotor (III)
Trochlear (IV)
Trigeminal (V)
I.
II.
III.
IV.
V.
VI.
VII.
VIII.
IX.
X.
XI.
XII.
Olfactory
Optic
Oculomotor
Trochlear
Trigeminal
Abducens
Facial
Vestibulocochlear
Glossopharyngeal
Vagus
(spinal) accessory
hypoglossal
Abducens (VI)
Facial (VII)
Vestibulocochlear (VIII)
Glossopharyngeal (IX)
Vagus (X)
Hypoglossal (XII)
Accessory (XI)
2
Cranial Nerves I: Olfactory Nerve
Label the images with the following terms:
❑ Olfactory bulb
❑ Cribriform plate (on the ethmoid bone)
Olfactory bulb
Cribriform plate
Circle the correct answer:
What is the cranial passage for this
nerve?
What is the function of this cranial
nerve?
This cranial nerve carries…
a. Sensory fibers
b. Motor fibers
c. Both sensory and motor fibers
3
Cranial Nerves II: Optic Nerve
Circle the correct answer:
This cranial nerve carries…
a. Sensory fibers
b. Motor fibers
c. Both sensory and motor fibers
What is the cranial passage for this nerve?
What is the function of this cranial nerve?
There are four cranial nerves that are concerned exclusively with the eyes. The optic nerve is one; what are
the other three?
4
Cranial Nerves III: Oculomotor Nerve
Circle the correct answer:
This cranial nerve carries…
What is the cranial passage for this nerve?
a. Sensory fibers
b. Motor fibers
c. Both sensory and motor fibers
What is the function of this cranial nerve?
5
Cranial Nerves IV: Trochlear Nerve
Circle the correct answer:
This cranial nerve carries…
What is the cranial passage for this nerve?
a. Sensory fibers
b. Motor fibers
c. Both sensory and motor fibers
What is the function of this cranial nerve?
6
Cranial Nerves V: Trigeminal Nerve
Opthalmic (V1)
There are three major branches of the
trigeminal nerve (listed below). Label the
branches on the image.
❑ Ophthalmic (V1)
❑ Maxillary (V2)
❑ Mandibular (V3)
Maxillary (V2)
Mandibular (V3)
What is the function of this cranial nerve?
What is the cranial passage for each branch of this nerve?
Circle the correct answer:
Opthalmic:
This cranial nerve carries…
Maxillary:
Mandibular:
a. Sensory fibers
b. Motor fibers
c. Both sensory and motor fibers
*V1 and V2 are sensory nerves, whereas V3 is mixed. Dental pain is felt through the trigeminal nerve and V3 also has
motor function in mastication.
7
Cranial Nerves VI: Abducens Nerve
Circle the correct answer:
This cranial nerve carries…
What is the cranial passage for this nerve?
a. Sensory fibers
b. Motor fibers
c. Both sensory and motor fibers
What is the function of this cranial nerve?
8
Cranial Nerves VII: Facial Nerve
There are five major branches of the facial
nerve (listed below). Label the branches on the
image.
❑ Mandibular
❑ Temporal
❑ Cervical
❑ Zygomatic
❑ buccal
Circle the correct answer:
This cranial nerve carries…
Temporal
Zygomatic
Buccal
Mandibular
Cervical
a. Sensory fibers
b. Motor fibers
c. Both sensory and motor fibers
What is the cranial passage for this nerve?
What is the function of this cranial nerve?
9
Cranial Nerves VIII: Vestibulocochlear Never
Circle the correct answer:
This cranial nerve carries…
*Forms by convergence of the cochlear
nerve from the cochlea and vestibular
nerve from the semicircular ducts and
vestibule of the inner ear.
d. Sensory fibers
e. Motor fibers
f. Both sensory and motor fibers
What is the cranial passage for this nerve?
What is the function of this cranial nerve?
10
Cranial Nerves IX: Glossopharyngeal Nerve
Circle the correct answer:
This cranial nerve carries…
a. Sensory fibers
b. Motor fibers
c. Both sensory and motor fibers
What is the cranial passage for this nerve?
What is the function of this cranial nerve?
11
Cranial Nerves X: Vagus Nerve
Circle the correct answer:
This cranial nerve carries…
a. Sensory fibers
b. Motor fibers
c. Both sensory and motor fibers
What is the cranial passage for this nerve?
What is the function of this cranial nerve?
12
Cranial Nerves XI: Accessory (spinal) Nerve
Circle the correct answer:
This cranial nerve carries…
a. Sensory fibers
b. Motor fibers
c. Both sensory and motor fibers
What is the cranial passage for this nerve?
What is the function of this cranial nerve?
*Arises not from the brain but from the
upper spinal cord; therefore, strictly
speaking, it’s not a true cranial nerve!
13
Cranial Nerves XII: Hypoglossal Nerve
Circle the correct answer:
This cranial nerve carries…
a. Sensory fibers
b. Motor fibers
c. Both sensory and motor fibers
What is the cranial passage for this nerve?
What is the function of this cranial nerve?
14
Optic (II)
Olfactory (I)
Labe each of the
cranial nerves
shown in this
image
Oculomotor (III)
Abducens (VI)
Trochlear (IV)
Trigeminal (V) V1 branch
Facial (VII)
Trigeminal (V)
V2 and V3 branches
Vestibulocochlear (VIII)
Vagus (X)
Glossopharyngeal (IX)
15
Pink = motor (away from brain)
Green = sensory (to brain)
Hypoglossal (XII)
Accessory (XI)
What degenerative disorder is shown in this image?
What cranial nerve is an issue with this disorder?
16
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