Cranial Nerves and their Palsies

Question 1

All of the following brainstem nuclei are involved with cranial nerve function EXCEPT: Inferior salvitory nucleus, Superior Salivatory nucleus, Solitary, Ventral medial nucleus

Answer 1

Ventral Medial Nucleus

Question 2

This vessel is located below pterion

Answer 2

Middle meningial artery

Question 3

Which of the following statements is true regarding vision and optic nerve fibers:

Answer 3

Median/Nasal fibers decussate and cross at the optic chiasm on their way to the occipital lobe.

Question 4

Coordination of muscle movement is controlled by the

Answer 4

cerebellum

Question 5

Damage to the medulla would impair which cranial nerves?

Answer 5

IX, XI, XII

Question 6

All of the following muscles receive motor innervation from the facial nerve except:

Answer 6

Masseter

Question 7

Motor innervation of the tongue is done by which Cranial Nerves?

Answer 7

10 and 12 (Vagus, Hypoglossal)

Question 8

Malfunction of which cranial nerve would effect the Efferrent output of the gag reflex?

Answer 8

Vagus (CN X)

Question 9

Sensory innervation to the hypothenar region of the hand.

Answer 9

Ulnar

Question 10

The platysma is innervated by

Answer 10

cervical branch of the facial nerve

Question 11

In which bone is the vestibulocochlear nerve mostly contained?

Answer 11

Petrous portion of the temporal bone

Question 12

Which of the following controls lens accommodation of the eye:

Answer 12

cilliary body

Question 13

What nerve controls the pupil?

Answer 13

Oculomotor (closes the pupil), Superior cilliary ganglion (Opens the pupil)

Question 14

Optic chiasm refers to the

Answer 14

partial splitting of optic nerve fibers to form the left and right optic tracts

Question 15

Which of the following is not correct for the trochlear nerve?

Answer 15

It pulls the eye up and in. (The eye only does this if the trochlear nerve is damaged.

Question 16

Which of the following is not correct for 8 cranial nerve?

Answer 16

It contains somatic motor fibers

Question 17

A lesion of the facial nerve may result in all of the following except?

Answer 17

Inability to open the eye

Question 18

A complete lesion of the oculomotor nerve would produce all of the following signs except:

Answer 18

Pupillary constriction

Question 19

Following an automobile accident resulting in a cranial base fracture, tongue deviates to the right and has moderate dysarthria. You suspect damage to the

Answer 19

right hypoglossal nerve

Question 20

A lateral tarsorrhaphy is performed on someone who suffers from a particularly pronounce palsy of the

Answer 20

Facial nerve (CVII)

Question 21

80 year old man difficulty swallowing. Left side of tongue atrophied and deviates to left side. Most likely has:

Answer 21

malignancy in medulla affecting the left hypoglossal nerve

Question 22

A bulbar palsy results in

Answer 22

end organ disfunction

Question 23

Which of the following is consistent with a bells palsy:

Answer 23

food dribbling outside of mouth

Question 24

In a complete oculomotor nerve palsy the pupil is

Answer 24

depressed and abducted

Question 25

19 yr old complains of numbness of the nasopharynx after removal of the adenoid tonsils. Which cranial nerve was damaged?

Answer 25

Glossopharyngeal

Question 26

34 year old gets in a barfight severes abducens nerve proximal to its entrance to the orbit. What would happen to the eye.

Answer 26

Medial deviation (esotropia)

Question 27

24 yr old guy lands in a creek on his motorcycle. Death may result from bilateral separation of the

Answer 27

Vagus nerve or phrenic nerve

Question 28

Following radical dissection of a primary tongue tumor. Old guy loses general sensation on anterior ⅔ of tongue. Which cranial nerve was damaged?

Answer 28

Trigeminal Nerve

Question 29

Medial deviation of the eye (esotropia) results from damage to

Answer 29

the abducens nerve (CN VI)

Question 30

Most common form of cranial nerve palsy is

Answer 30

Bell’s Palsy

Question 31

A pharyngeal gag reflex is caused by tongue depressor, the afferent nerve fibers are branches of what nerve:

Answer 31

Glossopharyngeal

Question 32

Following a penetrating injury to the submandibular triangle, his tongue deviates to his left on protrusion which of the following nerves is injured:

Answer 32

Left hypoglossal

Question 33

59 yr. old stroke patient is unable to swallow because of a nerve injury. Which of the following nerves is unaffected.

Answer 33

Spinal accessory

Question 34

45 year old dental student is admited to ER with headaches, vomiting, radiographic exam shows giant tumor. Dryness of nasal and paranasal sinuses, lost of lacrimation and loss of taste of anterior ⅔ of tongue:

Answer 34

Facial nerve

Question 35

70 year old is admitted to hospital with severe headaches. He has difficulty coughing and swallowing:

Answer 35

Vagus

Question 36

34 yr. old male complains of sensitivity to loud sounds. Which cranial nerve is responsible?

Answer 36

Facial (C7)

Question 37

34 year old Swimmer presents with infection in ear canal. Patient coughs when you look in the ear.

Answer 37

Vagus

Question 38

48 yr. old female is unconscious with a tumor in her brain. Right eye is directed laterally and down with complete ptosis of the upper eyelid. Her pupil is dilated. Which nerve is most likely damaged.

Answer 38

Oculomotor CN(3)

Question 39

33 yr. old woman is unconscious after falling and hitting her head. A physician performs a pupillary light reflex test. The integrity of which of following nerves is being tested?

Answer 39

Optic and oculomotor

Question 40

34 yr old patient complains of hyperacusis.

Answer 40

Facial (CVII)

Question 41

7 yr old boy has infection of middle ear which spread to the mastoid air cells. Operation results in the right side of mouth drooping and can’t close his right eye. Which nerve was injured?

Answer 41

Facial

Question 42

10 yr. old female is admitted and has tonsils removed. Absence of gag reflex on left when posterior portion of the tongue is depressed. Sensory portion of which nerve was injured?

Answer 42

Glossopharyngeal

Question 43

Surgeon performs mastectomy. Which nerves are in danger of injury.

Answer 43

Long Thoracic and Thoracodorsal

Question 44

Recurrent laryngeal nerve is a branch of the

Answer 44

Vagus nerve