CN VIII

Question 1

major motor nerve of face

Answer 1

CN VII

Question 2

Spits and cries

Answer 2

CN VII

Question 3

4 major targets of parasympathetics

Answer 3

lacrimal gland in eye and then 3 glands (parotid, submandibular, and ligual)

Question 4

CNIII passes through what to what

Answer 4

ciliary to eye to constrictor pupillae

Question 5

CN IX through what to what

Answer 5

otic to parotid gland

Question 6

CN VII through what to what

Answer 6

Starts through internal auditory meatus –> enters facial canal –> geniculate ganglion –> greater petrosal n. –> Through PPG and Submandibular to the lacrimal gland (tears) and submandibular and lingual; The facial n. also goes post to the ear and gives off nerve to stapedius

Question 7

CN VII emerges from where into what

Answer 7

Cerebellopontine angle into the internal auditory meatus

Question 8

CNVII exits what to get to the face

Answer 8

stylomastoid foramen

Question 9

Conveys parasympathetic fibers from CN II via the zygomatic n. (branch of V2) to lacrimal gland

Answer 9

Lacrimal n.

Question 10

Conveys parasympathetic fibers from CN IV to parotid gland

Answer 10

auriculotemporal n.

Question 11

Conveys parasympathetic fibers from CN VII via chorda tympani to submandibular and sublingual glands

Answer 11

lingual n.

Question 12

The branch of the trigeminal ganglion responsible for motor control is?

Answer 12

NONE!!! It is ONLY sensory

Question 13

parasympathetic ganglion

Answer 13

COPS (III, 9, 7,7)

Question 14

What does CNV have to do with parasympathetics?

Answer 14

They do NOT originate here but will jump on it later

Question 15

special visceral efferent

Answer 15

Resident Fiber of CN VII: Muscles derived from second pharyngeal arch-m. of facial expression, scalp, stylohyoid, stapedius, and post. belly of digastric

Question 16

General somatic afferent

Answer 16

Resident fiber of CN VII: auricle (external ear); tympanic membrane

Question 17

Special Visceral Afferent

Answer 17

Resident Fiber of CN VII: Gustatory fibers (taste) for ant. 2/3 of tongue and soft palate

Question 18

General Visceral Efferent

Answer 18

Resident fiber of CN VII: parasympathetic innervations of the glands

Question 19

General Visceral Afferent

Answer 19

Resident Fiber of CN VII: aids GVE in glandular secretions; sends signal back to turn down GVE

Question 20

Crazy path of CN VII to lacrimal gland

Answer 20

Starts from nervus intermedius –> through internal auditory meatus –> at geniculate ganglion but DO NOT synapse here —> joins with greater petrosal n. to form parasympathetic and sympathetic –> nerve of pterygoid canal –> Synapses at PPG –> hops on V2 –> hops on V1 the lacrimal n. branch –> the lacrimal gland (tears); The facial n. also goes post to the ear and gives off nerve to stapedius

Question 21

Saggy unilateral face, things sound loud, no tears

Answer 21

Problem with CN VII

Question 22

Saggy unilateral face, things sound loud, no tears, AND loss of balance

Answer 22

problem at cerebellopontine angle where CN VII and CN VIII are

Question 23

Facial nerve takes a turn at

Answer 23

Geniculate nucleus

Question 24

Four branches of CN VII

Answer 24

Greater petrosal
N. to the stapedius
Chorda tympani n.
Fibers from auricular branch of CN X

Question 25

Carries pre ganglionic parasympathetic ganglion to lacrimal gland

Answer 25

Greater petrosal n.

Question 26

why do you get an increase in sound

Answer 26

the stapedius n. cannot cause stapedius m. to contract which silences things

Question 27

nerve you can see in ear

Answer 27

Chorda tympani

Question 28

Nerve you can puncture in ear easily

Answer 28

chorda tympani because it is just below tympanic membrane

Question 29

knock out chorda tympani what happens

Answer 29

dry mouth, lose taste in 1/2 of 2/3 of tongue, things are loud

Question 30

Path to the sublingual and submandibular glands

Answer 30

Starts from nervus intermedius –> through internal auditory meatus –> enters infratemporal fossa–> geniculate ganglion (but just through, not cell bodies here-sensory only) –> chorda tympani branches out near TMJ; V3 (lingual n. of it) joins chorda tympani; they both go to the submandibular ganglion as post ganglionic fibers

Question 31

Important branch of V1

Answer 31

the lacrimal n. because it will receive parasympathetic fibers to go to the lacrimal gland

Question 32

Sympathetics originate from

Answer 32

T1-L2

Question 33

Path of sympathetics to the head

Answer 33

from T1-T4; superior cervical ganglion –> terminates where internal carotid artery bifurcates –> post ganglionic fibers run periarteriolarly (on arteries) –> most right to places; sympathetic to lacrimal is on opthalmic artery

Question 34

Ganglion which sympathetics run through

Answer 34

Superior cervical ganglion

Question 35

Pathway of Special Visceral afferent

Answer 35

From ant. 2/3 of tongue –> lingual n. (branch of V2) –> through chorda tympani –> cell body in geniculate ganglion

Also from soft palate

Question 36

deep petrosal n. is post or pre ganglionic?

Answer 36

Post b/c relayed at

Question 37

innervates parotid gland?

Answer 37

CN IX but 7 runs directly through it!!

Question 38

N. branches of muscles of facial expression

Answer 38

5 branches, Temporal, Zebras, Buccal, marginal mandibular, cervical; run through the parotid gland