Facial Nerve

Question 1

Sensory cell bodies of the facial nerve (SA and GSA) are located where?

Answer 1

The geniculate ganglion

Question 2

The internal acoustic meatus is in which cranial bone?

Answer 2

Temporal bone

Question 3

Describe the physical path of the Chordae Tympani nerve.

Answer 3

Arises from the facial nerve 5mm from stylomastoid foramen, and enters its own bony canal to the middle ear.

Passes over the medial surface of the tympanic membrane, arches over the malleus, and leaves the middle ear to run over the PETROTYMPANIC FISSURE.

Joins the lingual nerve (V3) in the ITF, and rides to the submandibular ganglion. Postganglionics exit, and SA branches continue to ANT 2/3 of tongue.

Question 4

What fibers run in the chord tympani nerve and what do they supply?

Answer 4

Preganglionic GVE till it reaches Submand ganglion. Then Postganglionics to Sublingual and Submandibular Ganglion.

SA fibers to the Ant 2/3 tongue

Question 5

What 2 hitchhiker nerves are associate with CN VII?

Answer 5

Chordae Tympani and the Greater Petrosal.

Question 6

Where do the BE fibers of the facial nerve go? What do they supply (general answer)

Answer 6

Enter skill thru IAM, run through the bony canal, exit the stylomastoid foramen without synapsing on the geniculate ganglion.

Trunk is in Parotid gland, and so are sensory branches.

Supply muscles of facial expression

Question 7

The muscles of facial expression are derivatives of what pharyngeal arch?

Answer 7

2

Question 8

Name the 5 BE motor branches of CN VII:

Answer 8

Ten Zebras Bit My Cock:

Temporal
Zygomatic
Buccal
Mandibular
Cervical

Question 9

The Facial nerve trunk has 2 divisions (superior and inferior). Name them and which nerves arise from them.

Answer 9

Temporofacial - Temporal and Zygomatic branches

Cervicofacial - Buccal, Mandibular, and Cervical

Question 10

In theParotid Region, the Facial nerve is superior to what structures?

Answer 10

The retromandibular vein and the external carotid artery.