Pathways of the Facial nerve (CN 7)

Question 1

Cranial nerve 7…

Branchial motor fibers run through what and comes out through where? Where does it go?

Answer 1

Runs through internal auditory meatus
Comes out through stylomastoid foramen
Goes to muscles of facial expression

Question 2

What is branchial motor associated with?

Answer 2

2nd branchial arch (hyoid)

Question 3

Cranial nerve 7…
Preganglionic parasympathetic fibers go through what to come out of the styloid process? Synapse where? Where do the postganglionic fibers go?

Answer 3

Go through internal auditory meatus
Synapse in submandibular ganglion
DOES NOT CARRY POSTGANGLIONIC FIBERS! But..
Postganglionic fibers go to...
-submandibular glands
-sublingual glands

Question 4

V3 passes through where? Carrying what fibers? Goes where?

Answer 4

Passes through foramen ovale
Carries sensory fibers
Goes to tongue

Question 5

What is V3 responsible for in the tongue?

Answer 5

General sensory for the rostral 2/3 of the tongue

Question 6

The facial nerve does NOT carry the postganglionic parasympathetic fibers to submandibular and sublingual glands. What does?

Answer 6

V3, since it’s already going that way with it’s sensory fibers

Question 7

Cranial nerve 7…
Parasympathetic preganglionic fibers travel through the internal auditory meatus to come out through a canal to synapse in what ganglion?
Where do the postganglionic fibers go?

Answer 7

Synapse in the pterygopalatine
DOES NOT CARRY POSTGANGLIONIC FIBERS!!! But...
Postganglionic fibers go to...
-nasal cavity glands
-lacrimal gland

Question 8

The facial nerve does NOT carry the postganglionic parasympathetic fibers to the nasal cavity glands, the lacrimal glands, the front teeth & gums, and back teeth & palate. What does?

Answer 8

V2, since it’s responsible for the maxillary portion

Question 9

What carries postganglionic parasympathetic fibers to the lacrimal gland?

Answer 9

V2 starts carrying them, but they must transfer to V1 to finally reach lacrimal gland

Question 10

Sympathetic postganglionic fibers go through the carotid canal are carried by what nerves? And go where?

Answer 10

V1 and V2

To target structures that concern V1 and V2

Question 11

Cranial nerve 7 is responsible for taste, so the rostral 2/3 of the tongue picks up taste. The sensation of taste is carried by CN 7 and goes back into the brain through what?

Answer 11

Internal auditory meatus