Cranial nerves

Question 1

Para sympathetic nerves and their innervations (4)

Answer 1

3 - constrictor pupillae and ciliary
7 - lacrimal, sublingual, submandibular
9 - parotid
10 - heart and body

Question 2

Nerves that are sensory only

Answer 2

1, 2, 8

Question 3

Function of CN 1

Answer 3

smell only

Question 4

Function of CN 2

Answer 4

vision only

Question 5

Function of CN 3

Answer 5

motor to most muscles of eye, para to puppliae and ciliary

Question 6

Nerves that are motor only

Answer 6

3, 4, 6, (V1, V2), 11, 12

Question 7

Nerves that are mixed

Answer 7

5 (V3), 7, 9, 10

Question 8

Path of nerve to constrict eye

Answer 8

CN3>ciliary ganglion>short ciliary>eye

Question 9

Function of CN 4

Answer 9

Motor only to sup. oblique

Question 10

Function of CN 6

Answer 10

Motor only to lat. rectus

Question 11

Function of V1

Answer 11

sense to forehead, bridge of nose, nasal mucosa, upper lid, conjuntiva, cornea

Question 12

Branches of V1

Answer 12

lacrimal
frontal (supraorbital and supratrochlear)
nasociliary

Question 13

Function of V2

Answer 13

sense to lower lid, cheek, upper lid, palate, parts of naso pharynx

Question 14

Branches of V2 and openings (7)

Answer 14

1. infraorbital - infraorbital fissure
2. Sup. alveolar - lateral wall of max. air sinus to upper teeth
3. Zygomatic - inf. orbital fissure across orbital floor to lat cheek
4. greater and lesser palatine - through greater palatine foramen to palate
5. lateral nasal branch - through sphenoalatine foramen to lateral nasal mucosa
6. nasopalatine - through sphenopalatine foramen to nasal septum
7. phayngeal branch to nasopharynx

Question 15

Function of V3

Answer 15

Motor - masticators, tensor palatini, tensor tympani, ant. digastric, mylohyoid
Sensory - auricle, ext. aud. meatus, ext. surface of tympanic membrane, lower jaw, floor of mouth, ant. 2/3 of tongue

Question 16

branches of V3

Answer 16

buccal, lingual, inf. alveolar (mental), auriculotemporal

Question 17

Function of CN 7 (4)

Answer 17

sense - ext. aud meatus, external tympanic membrane
special sense - taste for ant. 2/3 of tongue
motor - muscles of facial expr., post. digastric, stylohyiod, stapedius
para - sublingual, submandibular, lacrimal

Question 18

point of entrance and exit of CN7

Answer 18

int. auditory meatus, stylomastoid foramen

Question 19

Function of CN8 (2)

Answer 19

hearing - cochlear

balance - vestibular

Question 20

function of CN 9 (4)

Answer 20

sense - tympanic membrane, mucosa of middle ear, mastoid air cells, aud. tube, pharynx, palatine tonsil, post. 2/3 of tongue
taste - post. 2/3 of tongue, special to carotid sinus
motor - stylopharyngeus
para - parotid glans

Question 21

Function of CN 10 (4)

Answer 21

sense - laryngeopharynx, larynx, ext. aud. meatus, ext tympanic
special - carotid sinus
motor - pharynx, intrinsic larynx, levator palatini, palatoglossus
para - neck down to SMA

Question 22

Branches of CN10 (5)

Answer 22

auricular, sinus nerve, pharyngeal, sup layrngeal, recurrent laryngeal

Question 23

Function of CN 11

Answer 23

somatic to sternocleidomastoid and traps

Question 24

Function of CN 12

Answer 24

somatic to intrinsic and extrinsic muscles of tongue