Summary of the Cranial Nerves: Main Action(s)

Question 1

olfactory:
special sensory (1)

Answer 1

smell from olfactory epithelium

Question 2

optic:
special sensory (1)

Answer 2

vision from retina

Question 3

oculomotor:
somatic motor (5)

Answer 3

levator palpebrae superioris
superior rectus
medial rectus
inferior rectus
inferior oblique

Question 4

oculomotor:

parasympathetic (2)

Answer 4

sphincter of the pupil

ciliary muscle of eye

Question 5

trochlear:

somatic motor

Answer 5

superior oblique

Question 6

trigeminal:
opthalmic:
general sensory (6)

Answer 6

sensaiton from orbital structures
skin of forehead
scap
upper eyelid
nasal cavity
part of external nose

Question 7

trigeminal:
maxillary:
general sensory (7)

Answer 7

sensation from skin of face over maxilla
upper lip
maxillary teeth & gums
maxillary sinuses
nasal cavity
palate
nasopharynx

Question 8

trigeminal:
mandibular:
general sensory (6)

Answer 8

sensation from skin over mandible
lower lip
side of head
lower teeth & gums
TMJ
mucosa of mouth & anterior two-thirds of tongue

Question 9

trigeminal:
mandibular:
branchial motor (5)

Answer 9

muscles of mastication
tensor tympani
tensor veli palatini
mylohyoid
anterior belly of digastric

Question 10

abducens:
somatic motor (1)

Answer 10

lateral rectus

Question 11

facial:
branchial motor (4)

Answer 11

muscles of facial expression
stapedius
stylohyoid
posterior belly of digastric

Question 12

facial:
special sensory (1)

Answer 12

taste from anterior two-thirds of tongue & palate

Question 13

facial:
general sensory (1)

Answer 13

portion of external ear

Question 14

facial:

parasympathetic (3)

Answer 14

submandibular, sublingual, & salivary glands
lacrimal glands
glands of nose & palate

Question 15

vestibulocochlear:
vestibular ganglion (1)

Answer 15

position & movement of head from utricle, saccule, & semicircular ducts

Question 16

vestibulocochlear:
cochlear ganglion (1)

Answer 16

hearing from cochlea

Question 17

glossopharyngeal:
branchial motor (1)

Answer 17

stylophrayngeus muscle

Question 18

glossopharyngeal:

parasympathetic (1)

Answer 18

parotid gland

Question 19

glossopharyngeal:
visceral sensory (2)

Answer 19

carotid body

carotid sinus

Question 20

glossopharyngeal:
special sensory (1)

Answer 20

taste from posterior one-third of tongue

Question 21

glossopharyngeal:
general sensory (4)

Answer 21

posterior one-third of tongue
oropharynx
auditory tube
middle ear

Question 22

vagus:
branchial motor (4)

Answer 22

muscles of pharynx except stylopharyngeus
muscles of palate except tensor of palate
all muscles of larynx
striated muscle in upper two-thirds of esophagus

Question 23

vagus:

parasympathetic (2)

Answer 23

smooth muscle & glands of thoracic viscera

foregut & midgut of abdomen

Question 24

vagus:
visceral sensory (7)

Answer 24

larynx
trachea
esophagus
thoracic viscera
foregut & midgut of abdomen
baroreceptors in the aortic arch
chemoreceptors in aortic bodies

Question 25

vagus:
special sensory (1)

Answer 25

taste from epiglottis & valleculae

Question 26

vagus:
general sensory (4)

Answer 26

part of external ear
external acoustic meatus
external surface of tympanic membrane
laryngopharynx

Question 27

accessory:
branchial motor (2)

Answer 27

sternocleidomastoid

trapezius

Question 28

hypoglossal:
somatic motor (1)

Answer 28

intrinsic & extrinsic muscles of the tongue except palatoglossus