Cranial Nerve Work Sheet - Anatomy Resources



Cranial Nerve Work Sheet

Answer the following questions using your memory, the syllabus, your textbook and whatever other reference you want.

1. Why are CN’s numbered the way they are numbered?

2. What can you glean from each CN simply by its name?

a. Olfactor n.

b. Optic n.

c. Oculomotor n.

d. Trochlear n.

e. Trigeminal n.

f. Abducens n.

g. Facial n.

h. Vestibulocochlear n.

i. Glossopharyngeal n.

j. Vagus n.

k. Spinal accessory n.

l. Hypoglossal n.

3. What CN’s contain the following?

a. Only sensory neurons

b. Only motor neurons

c. Mixed neurons

d. Somatic motor neurons

e. Branchial motor neurons

f. Visceral (parasympathetic) neurons

g. General sensory neurons

h. Special sensory neurons

i. Visceral sensory neurons

4. Identify the CN’s and/or vessels that traverse the following:

a. Cribriform foramina

b. Optic canal

c. Superior orbital fissure

d. Internal acoustic meatus

e. Through the lateral wall of the cavernous sinus

f. Jugular foramen

g. Hypoglossal canal

h. Foramen rotundum

i. Foramen ovale

j. Foramen magnum

k. Greater petrosal hiatus

l. Lesser petrosal hiatus

m. Foramen spinosum

5. Identify the CN that would most likely result in the following:

a. Loss of hearing

b. Abnormal/alteration of taste on the posterior tongue

c. Loss of smell

d. Miosis

e. Loss of sensation over the forehead

f. Downward and lateral gaze deviation

g. Weakness in chewing

h. Loss of balance

i. Inability to look down and in

j. Ptosis

k. Blindness

l. Loss of sensation over the skin of the nose

m. Vocal cord paralysis

n. Loss of salivation

o. When saying “Ahhhh” during a physical exam a patients uvula deviates to the left

p. Facial palsy

q. Shoulder shrugging weakness

r. During a physical exam a patient is instructed to protrude her tongue and when she does her tongue always deviates to the left

s. Abnormal/alteration of taste on the anterior tongue

t. Dilated pupils

6. Identify the region of the brain where the nuclei of CN’s III-XII are associated (CN I and II are extensions of the brain rather than true peripheral nerves and are therefore not associated with nuclei in the brainstem):

a. Midbrain

b. Pons

c. Medulla oblongata

7. Identify what cell bodies are housed in each of the following ganglia:

a. Ciliary

b. Geniculate

c. Glossopharyngeal

d. Otic

e. Pterygopalatine

f. Submandibular

g. Superior cervical

h. Vagus

8. What is the only CN to be affected by multiple sclerosis (MS)? Why?

9. Identify the CN that innervates each of the following:

a. Submandibular salivary gland

b. Parotid gland

c. Lacrimal gland

d. Palatal glands

e. Tongue movement

f. All six eye muscles

g. Elevation of the upper eyelid

10. A woman involved in a motor vehicle accident cannot turn her head to the left and has right shoulder droop. Which nerve is damaged?

11. Patient cannot blink his eye or seal his lips on the right side. Which nerve is damaged?

12. What are the 3 classic signs of Horner’s syndrome? (Hint: PAM is Horny) Explain what could cause a patient to present with each of these findings.

13. Describe each of the following reflexes and identify the CN’s/nerves responsible for sensory and motor limbs of each reflex:

a. Corneal reflex

b. Cough reflex

c. Gag reflex

d. Pupillary reflex

e. Accommodation reflex of the lens

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