Cranial Nerves

Question 1

define nerve nuclei

Answer 1

collection of cell bodies

Question 2

define ganglion

Answer 2

collection of cell bodies outside of the CNS

Question 3

what considers a nerve as a cranial nerve

Answer 3

nerve that emerges through foramina or fissures in the cranium
covered by sheaths derived from the cranial membranes

Question 4

name of CN I

Answer 4

olfactory

Question 5

name of CN II

Answer 5

optic

Question 6

name of CN III

Answer 6

oculomotor

Question 7

name of CN IV

Answer 7

trochlear

Question 8

name of CN V

Answer 8

trigeminal

Question 9

name of CN VI

Answer 9

abducens

Question 10

name of CN VII

Answer 10

facial

Question 11

name of CN VIII

Answer 11

vestibulocochlear

Question 12

name of CN IX

Answer 12

glossopharyngeal

Question 13

name of CN X

Answer 13

vagus

Question 14

name of CN XI

Answer 14

accessory/spinal accessory

Question 15

name of CN XII

Answer 15

hyppglossal

Question 16

where does the CN I/olfactory nerve arise from

Answer 16

nasal cavity/nasal mucosa

Question 17

where is the location of the nerve cell bodies of the CN I/olfactory nerve

Answer 17

olfactory epithelium

Question 18

what are deficits of CN I/olfactory nerve

Answer 18

anosmia: loss of smell

Question 19

what is the function of CN II/optic nerve

Answer 19

special sensory - vision

Question 20

is CN II/optic nerve sensory, motor, both

Answer 20

sensory

Question 21

where are the location of the cell bodies for CN II/optic nerve

Answer 21

retinal ganglia

Question 22

where is the CN II/optic nerve located

Answer 22

superior to the midbrain

Question 23

what can occur with CN II deficits

Answer 23

visual deficits

Question 24

what is the function of the medial rectus muscle

Answer 24

eye adduction

Question 25

what is the function of the superior rectus muscle

Answer 25

up and inward movement of the eye

Question 26

what is the function of the inferior oblique muscle

Answer 26

up and outward movement

Question 27

what is the function of the lateral rectus muscle

Answer 27

eye abduction

Question 28

what is the function of the superior oblique muscle

Answer 28

down and out

Question 29

what cranial nerve supplies the lateral rectus muscle

Answer 29

CN VI

Question 30

what cranial nerve supplies the superior oblique muscle

Answer 30

CN IV

Question 31

what cranial nerve supplies the superior rectus, inferior oblique, inferior rectus, and medial rectus muscles

Answer 31

CN III

Question 32

what is the function of CN III

Answer 32

pupil constriction - parasympathetic | lens accommodation for near vision/focus - parasympathetic

Question 33

what is the ciliary muscle

Answer 33

surrounds the lens | relaxes and lens flattens - distant vision

Question 34

where is the location of the nerve cell bodies for CN III/oculomotor nerve

Answer 34

midbrain

Question 35

where can you find the CN III/oculomotor nerve

Answer 35

between midbrain and pons

Question 36

what will occur with CN III deficit

Answer 36

ptosis: eyelid drooping, caused by paralysis of the levator palpebrae superioris lateral strabismus - eye directed in and out absent pupillary light reflex dilated pupil lack of lens accommodation

Question 37

what is the function of the CN IV/trochlear nerve

Answer 37

eye muscle - superior oblique

Question 38

is CN IV/trochlear nerve considered a sensory or motor nerve

Answer 38

motor

Question 39

where is the location of the cell bodies of CN IV/trochlear nerve

Answer 39

posterior midbrain

Question 40

where is the CN IV/trochlear nerve located

Answer 40

laterally between the cerebrum and the pons

Question 41

what is the only CN to exit from the posterior/dorsal surface of the brainstem

Answer 41

CN IV/trochlear nerve

Question 42

what will occur with deficits of the CN IV/trochlear nerve

Answer 42

superior oblique muscles weakness/paralysis | diplopia/double vision when looking down

Question 43

what is the function of CN V/trigeminal nerve

Answer 43

skin sensation on the forehead, maxilla, mandible | innervation of muscles of mastication: temporalis, masseter, medial pterygoid, lateral pterygoid

Question 44

what muscles of mastication closes the mouth

Answer 44

temporalis masseter medial pterygoid

Question 45

what muscles of mastication close the mouth

Answer 45

lateral pterygoid