cranial nerves

Question 1

functions of CN 1

Answer 1

CN I = olfactory

SPECIAL sensory

Question 2

functions of CN 2

Answer 2

CN 2 = optic

SPECIAL sensory

Question 3

functions of CN 3 (2)

Answer 3

CN 3 = occulmotor

SOMATIC motor - to eye
VISCERAL motor - to eye [pupillary sphincter]

Question 4

parasympathetic ganglion for CN 3 =

Answer 4

ciliary ganglion

Question 5

CN 4 enters cranial cavity via

Answer 5

superior orbital fissure

Question 6

functions of CN 4

Answer 6

SOMATIC motor - to eye

Question 7

injury to CN4 results in

Answer 7

diplopia when looking down as CN 4 is somatic motor to eye

Question 8

occulomotor nerve innervates muscles of eye:

Answer 8

all muscles of eye except superior oblique and lateral rectus [[somatic]]

ciliary muscle and pupillary sphincter [[visceral]]

Question 9

CN 4 innervates

Answer 9

superior oblique of eye muscle. `

Question 10

CN 6 function

Answer 10

ABDUCENS

CN 6 function = somatic motor

Question 11

CN 6 innervates

Answer 11

lateral rectus muslce

Question 12

injury to CN 6 =

Answer 12

inability to abduct the affected eye

Question 13

CN 5 v1 function (6)

Answer 13

CN5 V1 = ophthalmic n

SOMATIC sensory

1. cornea
2. eye lids
3. forehead
4. scalp
5. nose
6. nasal mucosa

Question 14

CN 5V1 exits via

Answer 14

superior orbital fissure

Question 15

CN 5V2 exits via

Answer 15

MAXILLARY nerve, exits via foramen rotundum

Question 16

CN 5V2 function (7)

Answer 16

somatic sensory

1. upper lip
2. skin of face
3. maxillary teeth
4. maxillary sinuses
5. mucosa of nose
6. nasopharynx
7. palate

Question 17

CN 5 V3 function (7)

Answer 17

1. SOMATIC MOTOR = muscles of mastication
2. somatic SENSORY
   - 1. mandibular skin
   - 2. mandibular teeth
   - 3. lower lip
   - 4. anterior 2/3 of tongue
   - 5. mucosa of mouth
   - 6. TMJ
   - 7. SIDE OF HEAD

Question 18

CN V5 V3 exits via

Answer 18

foramen ovale

Question 19

CN 7 exits via

Answer 19

stylomastoid foramen, via internal acoustic meatus

Question 20

CN 7 functions

Answer 20

SPECIAL sensory - taste, anterior 2/3 of tongue

Somatic sensory: via geniculum of facial n, small area near ear [external meatus]

Visceral motor - via (para) ptyrogopalatine ganglion and submandibular ganglion

somatic motor: muscles of facial expression [posterior belly of digastric, stylohyoid, stapedius]

• 6 terminal branches
  1. posterior auricular
  2. temporal
  3. zygomatic
  4. buccal
  5. mandibular
  6. cervical

Question 21

pterygopalatine ganglion inneravtes

Answer 21

lacrimal gland, nasal gland, pharyngeal gland, and palatine glands

Question 22

submandibular glands innervate

Answer 22

sublingual salivary and submandibular salivary

Question 23

CN 8 function

Answer 23

SPECIAL SENSORY

Vesitubulocochlear
vestibular -> balance
cochlear -> hearing

Question 24

CN 8 exits via

Answer 24

internal acoustic meatus

Question 25

CN 9 functions

Answer 25

glossopharyngeal - somatic - visceral motor - special sensory - somatic sensory - visceral sensory

Question 26

CN 9 exits via

Answer 26

jugular foramen

Question 27

CN 9 somatic motor

Answer 27

assist with swallow via STYLOPHARGYNUS

Question 28

CN 9 special sensory

Answer 28

taste, posterior 1/3 tongue

Question 29

CN 9 somatic sensory

Answer 29

somatic sensory = external ear, middle ear, oropharynx gag reflex?

Question 30

CN 9 visceral sensory

Answer 30

visceral sensory = carotid body and sinus

Question 31

CN 9 visceral motor

Answer 31

parasympathetic innervation to parotid gland via otic ganglion