S1_L3: Cranial Nerves and Face

Question 1

Determine which statement is INCORRECT:

A. Cranial nerves exit brain through foramina in skull
B. CN I & II attach to the Forebrain
C. III-XII attach to the Brainstem
D. Only CN X and XI goes beyond the head-neck
E. Cranial nerves are numbered from anterior to posterior

Answer 1

D. Only CN X and XI goes beyond the head-neck

NOTE: Only the Vagus nerve (CN X) does so.

Question 2

Determine which nerves are sensory, motor, or both.

1. CN III
2. CN IX
3. CN X
4. CN II
   5.CN XII

A. Sensory
B. Motor
C. Both

Answer 2

1. B
2. C
3. C
4. A
5. B

Question 3

Determine which nerves are sensory, motor, or both.

1. CN II
2. CN V
3. CN VII
4. CN XI
5. CN IV

A. Sensory
B. Motor
C. Both

Answer 3

1. A
2. C
3. C
4. B
5. B

Question 4

How many branches do CN V have? Name all of its branches.

Answer 4

3 branches (Ophthalmic, Maxillary, Mandibular)

Question 5

This is a rare condition in which cleft lip on one side extends to medial margin of orbit due to failure of maxillary process to fuse with the lateral and medial nasal processes

Answer 5

Oblique facial cleft

Question 6

This is known as the sphincter of the mouth

Answer 6

Orbicularis oris

Question 7

Determine if the following descriptions or s/sx pertains to bell’s palsy or stroke.

1. CNS lesion
2. Peripheral lesion
3. upper portion is intact
4. whole side of the face is affected
5. solely affects the facial nerve

A. Bell’s Palsy
B. Stroke

Answer 7

1. B
2. A
3. B
4. A
5. A

Question 8

What is CN III?

Answer 8

Oculomotor Nerve

Question 9

What is CN V?

Answer 9

Trigeminal Nerve

Question 10

What is CN VII?

Answer 10

Facial Nerve

Question 11

The following statements are true, EXCEPT:

A. The function of CN I is for smell
B. To test the CN II, a practitioner may utilize a Snellen chart
C. Horner syndrome arises from lesions in CN III
D. CN IV innervated superior oblique muscle
E. CN V is the largest cranial nerve

Answer 11

C. Horner syndrome arises from lesions in CN III

NOTE: Only Ptosis and Diplopia results.

Question 12

Match the following nerve to its corresponding exit in the skull.

1. CN III
2. CN IV
3. CN XI
4. abducent neve
5. facial nerve

A. superior orbital fissure
B. jugular foramen
C. internal acoustic meatus
D. hypoglossal canal
E. None

Answer 12

1. A
2. A
3. B
4. A
5. C

Question 13

Match the following nerve to its corresponding exit in the skull.

1. CN V-3
2. CN V-2
3. CN8
4. CN XII
5. CN VII

A. foramen rotundum
B. foramen ovale
C. foremen spinosum
D. stylomastoid foramen
E. None

Answer 13

1. B
2. A
3. E
4. E
5. D

Question 14

TRUE OR FALSE: When a lesion occurs in CN II, blindness results.

Answer 14

True

Question 15

This is as the most slender cranial nerve

Answer 15

CN IV or Trochlear nerve

Question 16

This nerve supplies the muscles of mastication

Answer 16

CN V-3 or Mandibular branch of Trigeminal nerve

Question 17

Match the following descriptions to its corresponding cranial nerve.

1. Sense of pain, pressure, temperature
2. Taste from anterior 2/3 of tongue
3. Pain felt when tongue is accidentally bitten
4. Enters the internal acoustic meatus, passes through the facial canal, and exit to the stylomastoid foramen
5. Ipsilateral weakness arises from lesion

A. Trigeminal Nerve
B. Facial Nerve

Answer 17

1. A
2. B
3. A
4. B
5. B

Question 18

Match the following descriptions to its corresponding cranial nerve.

1. Constrictor muscle of pharynx
2. Controls muscle of tongue
3. Controls stylopharyngeus muscle
4. Controls balance
5. Called the “wandering” nerve

A. Auditory/ Vestibulocochlear Nerve
B. Glossopharyngeal Nerve
C. Vagus Nerve
D. Accessory Nerve
E. Hypoglossal Nerve

Answer 18

1. C
2. E
3. B
4. A
5. C

Question 19

Match the following descriptions to its corresponding cranial nerve.

1. Responsible for the bitter taste
2. Controls position and movement of head
3. Innervates SCM and Trapezius muscle
4. Innervates pharyngeal muscle for gag reflex
5. Lesion in this will have the tongue pointing towards side of lesion

A. Auditory/ Vestibulocochlear Nerve
B. Glossopharyngeal Nerve
C. Vagus Nerve
D. Accessory Nerve
E. Hypoglossal Nerve

Answer 19

1. B
2. A
3. D
4. C
5. E

Question 20

What muscle does the abducent muscle innervate?

Answer 20

Lateral rectus muscle (LR6)

Question 21

TRUE OR FALSE: The facial nerve is the longest intracranial nerve.

Answer 21

False.

It is the abducent nerve (CN VI)

Question 22

Enumerate the 3 processes for the development of the face.

Answer 22

1. Frontonasal processes
2. Maxillary processes
3. Mandibular processes

Question 23

Match the following description to its corresponding facial processes.

1. Forms the philtrum of upper lip
2. Develops as mesodermal proliferation
3. Forms the forehead
4. Becomes the upper jaw, cheek and bury the premaxilla and fuse in the midline
5. It grows medially below stomodeum and fuse in midline to form entire lower lip

A. Frontonasal processes
B. Maxillary processes
C. Mandibular processes

Answer 23

1. A
2. B
3. A
4. B
5. C

Question 24

This condition of the face is caused by failure of maxillary process to fuse in medial nasal process

Answer 24

Cleft upper lip

Question 25

Match the following branch of trigeminal nerve to its corresponding description. 1. supplies the upper eyelid, cornea, and conjunctiva 2. supplies the TMJ, part of auricle, and mucous membrane of mouth 3. has the auriculotemporal nerve as its branch 4. has the infraorbital nerve as its branch 5. has the infratrochlear nerve as its branch A. Ophthalmic branch B. Maxillary branch C. Mandibular branch

Answer 25

1. A 2. C 3. C 4. B 5. A

Question 26

What are the 4 muscles that are innervated by CN V-3?

Answer 26

1. Masseter 2. Temporalis 3. Lateral pterygoids 4. Medial pterygoids

Question 27

What kind of joint is the TMJ?

Answer 27

Modified hinge / condyloid joint

Question 28

The nerve to stapedius arises from what nerve?

Answer 28

Facial Nerve

Question 29

What is the cranial nerve number of the Glossopharyngeal nerve?

Answer 29

CN IX

Question 30

What is the cranial nerve number of the Accessory nerve?

Answer 30

CN XI

Question 31

What is the cranial nerve number of the Optic nerve?

Answer 31

CN II

Question 32

What is the smallest muscle of the body

Answer 32

stapedius muscle in middle ear

Question 33

Match the following facial nerve branch to its corresponding descriptions. 1. supplies anterior and superior auricular muscles, frontal belly of occipito frontalis muscles, orbicularis oculi and corrugator supercilii 2. emerges from the anterior border of gland below the parotid duct 3. cross lower margin of body of mandible to supply depressor anguli oris muscle 4. passes forward in the neck below mandible to supply the platysma muscle 5. supplies anterior border of gland and supplies orbicularis oculi A. Temporal branch B. Zygomatic branch C. Buccal branch D. Mandibular branch E. Cervical branch

Answer 33

1. A 2. C 3. E 4. E 5. B

Question 34

The following statements are true, EXCEPT: A. Occipitofrontalis muscle gives the face a surprise look B. Corrugator supercilii produces horizontal wrinkles of forehead as in frowning C. Procerus scrunches the nose D. Orbicularis oris compresses the lips together as in whistling or kissing E. None

Answer 34

B. Corrugator supercilii produces horizontal wrinkles of forehead as in frowning NOTE: it produces vertical wrinkles

Question 35

The following statements are true, EXCEPT: A. Mentalis allows the pouting of the lower lip B. Mentalis raises skin of chin during the expression of doubt C. Buccinator press cheeks against the molar teeth during chewing D. Buccinator compresses cheeks during kissing E. None

Answer 35

D. Buccinator compresses cheeks during kissing NOTE: It compressed during blowing

Question 36

The following statements are true, EXCEPT: A. Platysma drags jaw down B. Risorius draws corner of mouth laterally when grinning C. Styloglossus draw tongue up and back D. Geniohyoid depresses mandible E. Mylohyoid depresses mandible

Answer 36

E. Mylohyoid depresses mandible NOTE: Mylohyoid elevates floor of mouth and hyoid bone during first stage of swallowing

Question 37

The following muscles are paired with its correct action, EXCEPT: A. Zygomaticus major - draws angle of mouth superolaterally as in smiling or laughing B. Platysma - draws mouth down as in pouting C. Levator anguli oris - elevates corner of mouth D. Mentalis - depresses skin of chin during the expression of doubt E. None

Answer 37

D. Mentalis - depresses skin of chin during the expression of doubt NOTE: It raises skin of chin during the expression of doubt

Question 38

This part of the orbicularis oculi aids in eye blinking

Answer 38

Palpebral part of orbicularis oculi

Question 39

This part of the orbicularis oculi closes lids as in squinting to protect from glare or dust

Answer 39

Orbital part of orbicularis oculi

Question 40

This is a sensory disorder of the sensory root of CN V characterized by sudden attacks of excruciating, lightening like jabs of facial pain;

Answer 40

Trigeminal neuralgia (tic douloreux)

Question 41

This is an infection caused by a virus that produces lesion in the spinal or cranial ganglia. This is characterized by eruption of group of vesicles and may involve any branch but the ophthalmic division of the trigeminal n. Usually, the cornea is involved causing painful ulcerations

Answer 41

Herpes zoster (shingles)

Question 42

Determine if the following are s/sx or facts about Bell's Palsy. 1. lose sense of taste on the side of the tongue 2. sound heard is very soft 3. the higher the lesion, the longer the recovery 4. the nearer the lesion to the exit, the faster the recovery 5. when lesion is found before it exits at the stylomastoid foramen, all the 5 branches of facial nerve will be affected A. Yes B. No

Answer 42

1. A 2. B 3. A 4. A 5. A

Question 43

The Parotid region is innervated by _______ nerve

Answer 43

glossopharyngeal

Question 44

This is also known as Stensen’s duct

Answer 44

Parotid duct

Question 45

The (1)______ is the largest salivary gland, while the (2)______ is the second largest salivary gland.

Answer 45

1. Parotid gland 2. Submandibular gland