5 - Facial Nerve (Cn Vii)

Front 1

these are major functions of what n?

innervation of mm of facial expression (including closing eyes), lacrimation, mucouss production in nasopharyngeal region, salivation form the sublingual and submandibular glands, taste from the anterior 2/3 of tongue, dampening abrupt & loud noises

Back 1

Facial N.(CN VII

w/ most important fxn being the innervation of the mm of facial expression

Front 2

four fiber types of the facial n (CN VII)

Back 2

1) motor- to mm of facial expression
2) autonomic- to lacrimal & salivary glands, to mucous glands, the nose and palate
3) general sensory- sensation from skin around the ear
4) special sensory- taste from the anterior 2/3 of the tongue

Front 3

what pharyngeal arch are the mm's of facial expression derived from?

Back 3

the 2nd pharyngeal arch

Front 4

T/F:
CN's come out of the the brainstem

Back 4

TRUE

Front 5

Where does CN VII come off the brainstem?

Back 5

the pontomedullary jxn (from pons)

Front 6

what hole pf the skull does the facial nerve (CN VII) initially exit through?

Back 6

the internal acoustic meatus
(a.k.a. the internal auditory canal, or the internal auditory meatus)

Front 7

damage to the branch of Facial n. (CN VII) that supplies the stapedius m. would cause

Back 7

hyperacusis - high sensitivity to sudden, loud sounds

Front 8

while the bulk of the Facial n. (CN VII) fibers go through the ______ gland to the mm of facial expression; a few fibers split off to innervate the stylohoid, post. belly of the digastric, occipitalis & posterior auricularis mm.

Back 8

parotid

Front 9

one branch on the Facial n. (CN VII) comes of in the facial canal as the nerve to the __________ to innervate the m that dampens sudden, loud sounds

Back 9

stapedius

Front 10

if the Facial n. (CN VII) is damaged lower (closer to the parotid gland) then only loss of innervation to the ______A_______ would result; but if it is injured higher, and closer to the geniculate nucleus, then loss of innervation to the ______A_____ and ______B______ would result.

Back 10

A: muscles of facial expression
B: hyperacusis

Front 11

trace to path of the Facial n. (CN VII) from the brainstem through the parotid gland

Back 11

pons @ pontomeduallary jxn--> internal acoustic meatus--> geniulate ganglion --> (past stapedius, but may give branch to) --> through the stylomastoid foramen --> to the parotid gland to split into TZBMC

Front 12

where are the cell bodies of (A) the sensory component of the Facial n. (CN VII) and (B) the automonic fibers of the Facial n. (CN VII) located?

do they synapse here?

Back 12

A: sensory component: geniculate ganglion (no synapse here)

B: autonomic component: the superior salivary nucleus of the brainstem (synapse does occur here)

Front 13

damage to sensory fibers of Facial n. (CN VII) result in

Back 13

minor loss of sensation around the ear

Front 14

taste from the PALATE comes in to the brain via the ________________ n.

Back 14

Greater petrosal n.

Front 15

taste from the anterior 2/3 of tongue comes into the brain via the ___________ _________

Back 15

Chorda tympani

Front 16

Damage to special sensory fibers of Facial n. (CN VII) results in what?

Back 16

some loss of taste from either palate (greater petrosal n.) and/or the anterior 2/3 of the tongue (chorda tympani)

Front 17

trace the path of the Facial n. (CN VII) special sensory fibers from the anterior 2/3 of the tongue

Back 17

taste fibers --> lingual n. (branch of V3) --> chorda tympani --> facial n (CN VII) --> geniculate ganglion (cell bodies, no synapse) --> internal acoustic meatus --> pons of brainstem

Front 18

trace the path of the Facial n. (CN VII) special sensory fibers from the palate

Back 18

n. of pterygoid canal --> greater petrosal n. --> geniculate ganglion --> internal acoustic meatus --> brainstem

Front 19

the preganglionic parasympathetic fibers of the Facial n. (CN VII) are designed to innervate what 6 glands?

Back 19

lacrimal gland,
mucous glands of palate, nose, and pharynx,
and the submandibular and sublingual glands

Front 20

Describe the path of the fibers to the sublingual/submandibular glands by the facial n (CN VII)after:

superior salivary nucleus of the brainstem (pregang. para. fibers) --> internal acoustic meatus --> geniculate ganglion

Back 20

--> chorda tympani --> lingual n. --> submandibular ganglion (SYNAPSE) --> submandibular/sublingual glands (postgang. para. fibers)

Front 21

describe the path of the autonomic fibers of CN VII to the nose, palate, and pharynx after:

superior salivary nucleus of the brainstem (pregang. para. fibers) --> internal acoustic meatus --> geniculate ganglion

Back 21

--> greater petrosal n./ n. of pterygoid canal --> pterygopalatine ganglion (SYNAPSE) --> glands of nose, palate, and pharynx (postgang. para. fibers)

Front 22

describe the path of the autonomic fibers of CN VII to the lacrimal gland after:

superior salivary nucleus of the brainstem (pregang. para. fibers) --> internal acoustic meatus --> geniculate ganglion

Back 22

--> greater petrosal n./nerve of pterygoid canal --> pterygopalatine ganglion (SYNAPSE) --> CN V2 (postgang. para. fibers) --> lacrimal branch of CN 1 --> lacrimal gland

Front 23

damage to autonomic fibers of the Facial n. (CN VII) results in

Back 23

slightly dry mouth, decreased nasal secretions, dry eye (most significant effect) (Anhydrosis of Horner's Syndrome)