Cranial Nerves

Question 1

How many cranial nerves are there?

Answer 1

12 pairs

Question 2

What are the 4 differences between spinal and cranial nerves?

Answer 2

• different cranial nerves have different fiber types
• multiple cranial nerves innervate the same region
• some cranial nerves lack sensory ganglia
• cranial nerves have single roots

Question 3

What functions do special somatic afferent fibers support?

Answer 3

vision and hearing

Question 4

What functions do special visceral afferent fibers support?

Answer 4

smell and taste

Question 5

What area do general somatic afferent innervate?

Answer 5

face and mouth

Question 6

What area do general visceral afferent inervate?

Answer 6

pharynx and larynx

Question 7

What do somatic efferent innervate?

Answer 7

skeletal muscle

Question 8

What is nerve 0?

Answer 8

vomeronasal nerve

Question 9

What is the function of the nerve 0?

Answer 9

pheromone detection,

vomeronasal nerve

Question 10

Where does nerve 0 emerge?

Answer 10

cribiform plate

vomeronasal nerve

Question 11

What fiber type is nerve 0?

Answer 11

special visceral afferent SVA

vomeronasal nerve

Question 12

What is nerve I?

Answer 12

olfactory nerve

Question 13

What is the function of nerve I?

Answer 13

smell

olfactory nerve

Question 14

Where does nerve I emerge?

Answer 14

cribiform plate

olfactory nerve

Question 15

What fiber type is nerve I?

Answer 15

special visceral afferent SVA

olfactory nerve

Question 16

What is nerve II?

Answer 16

optic nerve

Question 17

What is the function of nerve II?

Answer 17

vision

optic nerve

Question 18

Where does nerve II emerge?

Answer 18

optic foramen

optic nerve

Question 19

What fiber type is nerve II?

Answer 19

special somatic afferent SSA

optic nerve

Question 20

What is nerve III?

Answer 20

oculomotor nerve

Question 21

What is the function of nerve III?

Answer 21

eye movement and pupil constriction,

oculomotor nerve

Question 22

Where does nerve III emerge?

Answer 22

orbital fissure

oculomotor nerve

Question 23

What fiber type is nerve III?

Answer 23

somatic efferent SE and visceral efferent VE

oculomotor nerve

Question 24

What is nerve IV?

Answer 24

trochlear nerve

Question 25

What is the function of nerve IV?

Answer 25

innervates dorsal oblique muscle trochlear nerve

Question 26

Where does nerve IV emerge?

Answer 26

orbital fissure trochlear nerve

Question 27

What fiber type is nerve IV?

Answer 27

somatic efferent SE trochlear nerve

Question 28

What is nerve V?

Answer 28

trigeminal nerve

Question 29

What is the function of nerve V?

Answer 29

innervate sensory of face and muscles of mastication trigeminal nerve

Question 30

What are the 3 division of nerve V and where do they emerge?

Answer 30

trigeminal nerve - opthalmic nerve (orbital fissure) - maxillary nerve (round foramen, alar canal) - mandibular nerve (oval foramen)

Question 31

What fiber type is nerve V?

Answer 31

general somatic afferent GSA and somatic efferent SE trigeminal nerve

Question 32

What is nerve VI?

Answer 32

abducent nerve

Question 33

What is the function of verve VI?

Answer 33

lateral gaze and third eyelid abducent nerve

Question 34

Where does nerve VI emerge?

Answer 34

orbital fissure abducent nerve

Question 35

What fiber type is nerve VI?

Answer 35

somatic efferent SE

Question 36

What is nerve VII?

Answer 36

facial nerve

Question 37

What is the function of nerve VII?

Answer 37

facial expression, taste, secretion facial nerve

Question 38

Where does nerve VII emerge?

Answer 38

internal acoustic meatus and stylomastoid foramen facial nerve

Question 39

What fiber type is nerve VII?

Answer 39

somatic efferent, visceral efferent, special visceral afferent, general somatic afferent facial nerve

Question 40

What is nerve VIII?

Answer 40

vestibulocochlear nerve

Question 41

What is the function of nerve VIII?

Answer 41

hearing and head acceleration vestibulocochlear nerve

Question 42

Where does nerve VIII emerge?

Answer 42

internal acoustic meatus vestibulocochlear nerve

Question 43

What fiber type is nerve VIII?

Answer 43

special somatic afferent SSA vestibulocochlear

Question 44

What is nerve IX?

Answer 44

glossopharyngeal nerve

Question 45

What is the function of nerve IX?

Answer 45

taste, saliva, pharynx and middle ear sensation glossopharyngeal nerve

Question 46

Where does nerve IX emerge?

Answer 46

jugular foramen glossopharyngeal nerve

Question 47

What fiber type is nerve IX?

Answer 47

general visceral afferent, special visceral afferent, visceral efferent glossopharyngeal nerve

Question 48

What is nerve X?

Answer 48

vagus nerve

Question 49

What is the function of nerve X?

Answer 49

larynx, pharynx, esophagus, thoracic and abdominal viscera vagus nerve

Question 50

Where does nerve X emerge?

Answer 50

jugular foramen vagus nerve

Question 51

What fiber type is nerve X?

Answer 51

somatic efferent, visceral efferent, general visceral afferent, special visceral afferent, general somatic afferent vagus nerve

Question 52

What is nerve XI?

Answer 52

accessory nerve

Question 53

What is the function of nerve XI?

Answer 53

neck muscles accessory nerve

Question 54

Where does nerve XI emerge?

Answer 54

jugular foramen accessory nerve

Question 55

What fiber type is nerve XI?

Answer 55

somatic efferent accessory nerve

Question 56

What is nerve XII?

Answer 56

hypoglossal nerve

Question 57

What is the function of nerve XII?

Answer 57

tongue muscles hypoglossal nerve

Question 58

Where does nerve XII emerge?

Answer 58

hypoglossal foramen hypoglossal nerve

Question 59

What fiber type is nerve XII?

Answer 59

somatic efferent hypoglossal nerve