Cranial Nerves

Question 1

Trigeminal nerve skeletal components

Answer 1

Malleus, Incus

Question 2

Trigeminal nerve muscles

Answer 2

Muscles of Mastication, Tensor tympani, Tensor palati, Mylohyoid, ant belly of Digastric

Question 3

Facial nerve skeletal components

Answer 3

Stapes, Styloid process, Hyoid bone - lesser horn, upper half of body

Question 4

Facial nerve muscles

Answer 4

Muscles of Facial Expression, Stapedius, Stylohyoid, Post. belly of Digastric

Question 5

Glossopharyngeal nerve skeletal components

Answer 5

Hyoid bone - greater horn, lower half of body

Question 6

Glossopharyngeal nerve muscles

Answer 6

Stylopharyngeus

Question 7

Vagus nerve skeletal components

Answer 7

Cartilages of Larynx

Question 8

Vagus nerve muscles

Answer 8

All muscles of Larynx, All muscles of Pharynx (except Stylopharyngeus), All muscles of Soft Palate (except Tensor palati)

Question 9

Spinal Accessory nerve innervates

Answer 9

Sternocleidomastoid, Trapezius

Question 10

Olfactory nerve is formed by

Answer 10

the axons of the bipolar neurons in the olfactory mucosa

Question 11

Olfactory nerve axons pass through

Answer 11

the cribriform plate of the ethmoid bone

Question 12

Olfactory nerve axons synapse on

Answer 12

the olfactory bulb, an extension of the CNS

Question 13

optic nerve is formed by

Answer 13

the axons of ganglion cells in the retina

Question 14

The optic nerve is ensheathed by

Answer 14

the oligodendrocytes (CNS)

Question 15

the optic nerve enters the skull through

Answer 15

the optic canal

Question 16

if the optic nerve is severed,

Answer 16

you are blind in 1 eye

Question 17

if optic chiasm severed,

Answer 17

lose some vision in both eyes (peripheral vision)

Question 18

if sever right optic tract,

Answer 18

lose left field of vision in both eyes

Question 19

Oculomotor nerve innervates

Answer 19

all of the extraorbital muscles, except:
Superior Oblique
Lateral Rectus

Question 20

the oculomotor nerve enters the orbit via

Answer 20

the superior orbital fissure

Question 21

Oculomotor nerve passes through _______, accompanied by

Answer 21

the cavernous sinus accompanied by the trochlear (IV) and abducens nerves (VI)

Question 22

parasympathetic components of oculomotor nerve

Answer 22

constrictor muscle of pupil, ciliary muscle (alteration of thickness of lens), accomodation

Question 23

What nerve is the only cranial nerve that is crossed (crosses before it leave the brainstem)?

Answer 23

trochlear nerve

Question 24

the trochlear nerve innervates

Answer 24

the superior oblique muscle

Question 25

the trochlear nerve exits via

Answer 25

the superior orbital fissure

Question 26

what is the largest cranial nerve?

Answer 26

trigeminal nerve

Question 27

branches of trigeminal nerve

Answer 27

ophthalmic, maxillary and mandibular

Question 28

trigeminal nerve gives sensory innervation to

Answer 28

the face, scalp, dura mater, eyeball, paranasal sinuses, anterior 2/3 of the tongue, floor of the mouth, teeth, lingual gingiva, palate, nasal cavity, nasopharynx, and external ear

Question 29

Ophthalmic branch exits through

Answer 29

the superior orbital fissure

Question 30

Maxillary branch exits through

Answer 30

the foramen rotundum

Question 31

mandibular branch exits through

Answer 31

the foramen ovale

Question 32

the abducens nerve innervates

Answer 32

the lateral rectus muscle (abduction of pupil)

Question 33

the supratrochlear nerve comes out above

Answer 33

the trochlear nerve

Question 34

action of the superior oblique

Answer 34

pulls down the eye

Question 35

tensor tympani action

Answer 35

lessens vibration (with loud noise)

Question 36

tensor palatini

Answer 36

tenses soft palate

Question 37

action of medial rectus

Answer 37

adducts pupil

Question 38

action of superior rectus

Answer 38

elevates pupil

Question 39

action of inferior rectus

Answer 39

depresses pupil

Question 40

action of inferior oblique

Answer 40

pulls eye up

Question 41

the facial nerve emerges (exits) at the

Answer 41

cerebellopontine angle

Question 42

the facial nerve enters the ________ with the ______.

Answer 42

internal acoustic meatus with the CN VIII

Question 43

the facial nerve descends through

Answer 43

the inner ear

Question 44

The facial nerve emerges through

Answer 44

the stylomastoid foramen

Question 45

The facial nerve is ________ sensory, trigeminal is _____ sensory

Answer 45

taste; touch

Question 46

The parasympathetic component of the facial nerve supplies

Answer 46

the lacrimal and parotid glands

Question 47

bell's palsy

Answer 47

damage to the facial nerve; can't move one side of the face

Question 48

Vestibulocochlear nerve exits via

Answer 48

the internal acoustic meatus and then divides into cochlear and vestibular divisions

Question 49

Vestibulocochlear nerve has 2 components:

Answer 49

cochlea and vestibular apparatus (semicircular canals)

Question 50

Glossopharyngeal nerve exits via

Answer 50

the jugular foramen accompanied with CN X & CNXI

Question 51

the superior ganglia of the glossopharyngeal nerve gives sensation to

Answer 51

the oropharynx

Question 52

the inferior ganglia of the glossopharyngeal nerve gives sensation to

Answer 52

(taste) to the posterior third of the tongue

Question 53

What is the longest cranial nerve

Answer 53

vegas

Question 54

Emerges just inferior to IX

Answer 54

the vegas nerve

Question 55

where does the vegas nerve exit?

Answer 55

Exits through the jugular foramen with IX and XI

Question 56

the vegas nerve nerve gives sensation to

Answer 56

dura of posterior cranial fossa Concha & external acoustic meatus and external surface of tympanic membrane Larynx

Question 57

vegas nerve innervates what muscles?

Answer 57

Muscles of the soft palate, larynx parasympathetic preganglionic fibers thoracic and abdominal viscera to the junction of the right 2/3 and left 1/3 of the transverse colon (goes to splenic fissure)

Question 58

Accessory nerve is composed of two parts:

Answer 58

cranial and spinal

Question 59

cranial part of accessory nerve

Answer 59

leaves the accessory nerve after entering the jugular foramen and joins the vagus nerve

Question 60

spinal part of accessory nerve

Answer 60

enters through foramen magnum and joins the cranial part at jugular foramen

Question 61

The hypoglossal nerve emerges from the

Answer 61

hypoglossal canal

Question 62

The hypoglossal nerve innervates

Answer 62

all lingual muscles with the exception of palatoglossus

Question 63

If there is a lesion on the left side of the tongue,

Answer 63

the tongue will go to the left