Cranial Nerves

Question 1

CN I

Answer 1

Olfactory

Question 2

CN II

Answer 2

Optic

Question 3

CN III

Answer 3

Oculomotor

Question 4

CN IV

Answer 4

Trochlear

Question 5

CN V

Answer 5

Tribe I also

Question 6

CN VI

Answer 6

Abducens

Question 7

CN VII

Answer 7

Facial

Question 8

CN VIII

Answer 8

Vestibulocochlear

Question 9

CN IX

Answer 9

Glossopharyngeal

Question 10

CN X

Answer 10

Vagus

Question 11

CN XI

Answer 11

Accessory

Question 12

CN XII

Answer 12

Hypoglossal

Question 13

T/F - CN I is covered in meninges and contains CSF specific cells

Answer 13

True, olfactory nerve is not a true cranial nerve as it is part of the telencephalon

Question 14

Where does the CN I nerve pass thru the skull?

Answer 14

Cribiform plate

Question 15

What type of nerve fibers in CN I?

Answer 15

Special visceral afferent nerves (viscerosensory)

Question 16

Where does the CN II pass thru the skull?

Answer 16

Optic canal

Question 17

T/F CN II fibers always cross at the optic chiasma

Answer 17

False - not always, some will and some will not

Question 18

What type of nerve fibers in CN II?

Answer 18

special somatic afferent (special somatosensory)

Question 19

Where does CN II attach to the brain?

Answer 19

Diencephalon

Question 20

Which muscles do CN III NOT innervate?

Answer 20

Lateral rictus and superior oblique

Question 21

Where does CN III pass thru the skull?

Answer 21

Superior orbital fissure

Question 22

What nerve fiber types does CN III contain?

Answer 22

Somatic and visceral motor

Question 23

The pupillary constrictors consist of what types of nerve fibers?

Answer 23

Visceral motor

Question 24

T/F CN III has somatic innervation to superior rectus, inferior rectus, medial rectus, and inferior oblique

Answer 24

True

Question 25

CN III attaches to the brain where?

Answer 25

Mesencephelon

Question 26

This nerve attaches to the brain at the mesencephalon, passes thru the superior orbital fissure, and arises on the dorsal surface of mesencephalon

Answer 26

CN IV - trochlear

Question 27

What is innervated by CN IV? Is it somatic or visceral motor control?

Answer 27

Superior oblique, somatic motor control

Question 28

T/F CN IV is the only CN to have contralateral symptoms

Answer 28

True, because the fibers cross as they emerge from the dorsal.

Question 29

What symptoms would one experience with a nuclear lesion of CN IV?

Answer 29

Contralateral

Question 30

What symptoms would one experience with a nerve lesion of CN IV?

Answer 30

Ipsilateral

Question 31

CN VI passes thru the skull where?

Answer 31

Superior orbital fissure

Question 32

What nerve fibers is CN VI contain?

Answer 32

Somatic motor control

Question 33

What does CN VI innervate?

Answer 33

Lateral rectus

Question 34

T/F CN VI attaches to the brain at the diencephalon

Answer 34

False, attaches at the pontomedullary junction

Question 35

CN V has how many branches? What are the names of each?

Answer 35

3; ophthalmic, maxillary, mandibular

Question 36

Where do the three branches of CN V pass thru the skull?

Answer 36

Opthalmic V1 - superior orbital fissure Maxillary V2 - Foramen rotundum Mandibular V3 - Foramen ovale

Question 37

Where does CN V attach to the brain?

Answer 37

Pons

Question 38

What are the general sensory regions of CN V ?

Answer 38

Anterior 2/3 of tongue, skin of the face, nasal mucosa

Question 39

What muscles do the CN V innervate?

Answer 39

Muscles of mastication, oral floor muscles

Question 40

What other CNs join with CN V and hitch hike?

Answer 40

CN VII join on V2 and V3 to get to glands of the face | CN IX joins V3 to get to parotid gland

Question 41

T/F - Tensor tympani and tensor veil palatine is innervated by CN IV

Answer 41

False, both innervated by CN V

Question 42

What branches come off of CN V1?

Answer 42

Frontal nerve, nasociliary, lacrimal

Question 43

What branches come off CN V2?

Answer 43

``` Zygomatic Infraorbital Posterior alveolar Middle alveolar Anterior superior alveolar ```

Question 44

Which nerves off of CN V2 penetrate the maxillary sinus?

Answer 44

Middle alveolar and anterior superior alveolar

Question 45

Auriculotemporal, buccal, masseteric, deep temporal, and pterygoid branches come off of what CN?

Answer 45

CN V3 - mandibular

Question 46

What CN runs with the lingual nerve? Where is it going?

Answer 46

Chords tympani (CN VII) is heading toward the submandibular and sublingual glands, and taste buds for anterior 2/3 of tongue

Question 47

T/F - Inferior alveolar nerve runs lateral to the mandible

Answer 47

False, runs in the mandible as it enters the Mandibular foramen and exits the mental foramen

Question 48

Mylohoid, anterior digastric have what motor nerve supply?

Answer 48

Inferior alveolar

Question 49

What sensory fibers run in the inferior alveolar nerve of CN V3?

Answer 49

Sensory fibers to pulp of teeth and also the mental nerve, which is sensory to skin and lip.

Question 50

What five branches come off of the facial nerve CN VII?

Answer 50

Temporal, zygomatic, buccal, cervical, posterior auricular

Question 51

CN VII innervates what?

Answer 51

Muscles of facial expression

Question 52

What branch of CN VII innervates lacrimal and nasal glands?

Answer 52

Greater petrosal nerve

Question 53

What branch of VII innervates submandibular, sublingual, and taste on anterior 2/3 of tongue?

Answer 53

Chorda tympani

Question 54

T/F - chorda tympani and the greater pertrosal nerve travel thru petrous part of temporal bone and exit in the stylomastoid foramen

Answer 54

False, these two branches branch off before the rest of CN VII leaves via the stylomastoid foramen

Question 55

T/F - CN VIII is motor only

Answer 55

False, CN VIII (vestibulocochlear) is sensory only

Question 56

T/F - CN IX has both motor and sensory nerve fibers

Answer 56

True

Question 57

Where does CN IX exit the skull?

Answer 57

Jugular foramen