unit 3: facial nerve (CN VII)

Question 1

the primary nucleus of origin of the facial nerve

Answer 1

motor nucleus of facial nerve

Question 2

nucleus that contributes PREganglionic parasympathetic fibers to the facial nerve

Answer 2

superior salivary

Question 3

nucleus of termination for facial nerve

Answer 3

upper part of solitary nucleus

Question 4

sensory cell bodies are found in the

Answer 4

geniculate ganglion

Question 5

along with taste, sensation from these two areas are carried to the geniculate ganglion, and ultimately to the solitary nucleus

Answer 5

external ear

tympanic membrane

Question 6

specific neurons with taste info from the anterior tongue are found in

Answer 6

chorda tympani

Question 7

LMN exit the CNS, travel thru the geniculate ganglion and innervate muscles of

Answer 7

facial expression

Question 8

while the motor nucleus gets info from both hemispheres & the __ ___, the part supplying the inferior face only gets info from the ____ ___

Answer 8

reticular formation

contralateral cortex

Question 9

two ganglion that recieve preganglionic para fibers from the superior salivatory nucleus

Answer 9

pterygopalatine

submandibular

Question 10

these areas receive POSTganglionic parasympathetic fibers

Answer 10

lacrimal, submandibular, sublingual glands

small glands of oral/nasal cavities

Question 11

apparent origin of facial nerve

Answer 11

sulcus bt pons & MO

-lateral to CN VI, medial to CN VIII

Question 12

fibers from the motor nucleus travel posteriorly and arch around the ___ ____

Answer 12

abducens nucleus

Question 13

two roots present at the apparent origin of the facial nerve

Answer 13

motor root
intermediate nerve (sensory/para fibers)

Question 14

after the two roots of the facial nerve exit the CNS, they enter the

Answer 14

internal acoustic meatus (in petrous part of temporal bone)

Question 15

the two facial roots combine into a trunk that enters the facial canal, bends posteriorly, and forms the _____ ____, which is where the geniculate ganglion is

Answer 15

external genu

Question 16

• branch of the facial the comes off the geniculate ganglion, thru the hiatus for the greater petrosal nerve, re-enters petrous part of temp bone thru foramen lacerum
• carries PREganglionic para fibers

Answer 16

greater petrosal nerve

Question 17

greater petrosal nerve, off of facial, travels the pterygoid canal after re-entering, ultimately joins the _______ ganglion, stimulates secretions of these 3 glands

Answer 17

pterygopalatine

lacrimal, nasal, palatal

Question 18

greater petrosal nerve aka

Answer 18

superficial petrosal

Question 19

nerve off facial that has only motor fibers leaving the facial nerve in facial canal, supplies stapedius musc of inner ear

Answer 19

nerve to stapedius

Question 20

nerve off facial that carries PREganglionic para & taste (ant 2/3) fibers, crosses tympanic cavity and leaves thru pterygotympanic fissure

Answer 20

chorda tympani

Question 21

the chorda tympani crosses tympanic cavity and leaves temporal bone through ____ ___, before combining w. lingual nerve

Answer 21

pterygotympanic fissure

Question 22

three branches off the facial between the stylomastoid foramen & parotid gland

Answer 22

digastric
stylohyoid
posterior auricular

Question 23

branch off facial that divides into occipital branch and auricular branch to supply extrinsic & intrinsic ear muscles

Answer 23

posterior auricular

Question 24

two trunks off of the facial that form that parotid plexus with the five major branches

Answer 24

temporofacial

cervicofacial

Question 25

muscles supplied by temporal branches in parotid plexus

Answer 25

intrinsic auricular

superior & anterior auricular

Question 26

muscles that are supplied by the temporal branches in combo with zygomaticotemporal (max) and auriculotemporal (mandib)

Answer 26

orbicularis oculi
corrugator supercilii
frontal belly of occipitofrontalis

Question 27

the ___ branches helps to supply the orbicularis oculi

Answer 27

zygomatic

Question 28

muscles supplied by the buccal branches

Answer 28

buccinator
orbicularis ORIS
levator anguli oris

Question 29

muscles that are usually supplied by the marginal mandibular branch

Answer 29

risorious

muscles of chin & lower lip

Question 30

the cervical branch supplies the

Answer 30

platysma

Question 31

• clinical condition involving the facial nerve that resolves on its own bc it is a CN problem
• one side of face cannot move

Answer 31

Bell’s Palsy

Question 32

removal of parotid gland due to a tumor

Answer 32

superficial parotidectomy