07a: CN VII Flashcards Preview

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Flashcards in 07a: CN VII Deck (15):
1

Facial nerve arises from (midbrain/pons/cerebellum), crosses (ant/mid/post) cranial fossa, and traverses (X) hole to enter (Y) bone.

Cerebello-pontine angle;
Posterior cranial fossa;
X = internal auditory meatus
Y = temporal

2

Within the temporal bone, CN VII travels within (X) landmark.

X = facial canal

3

Prior to traveling through (X) landmark and giving off its motor branches to face, the (Y) nerve gives off motor branch to (Z) muscle.

X = stylomastoid foramen
Y = facial
Z = stapedius

4

The (external/middle/inner) ear muscle supplied by CN VII is located in wall of (X) and functions to:

Middle;
X = facial canal;
Minimizes motion of footplate in oval window (dampens vibrations)

5

All modalities, except (X), of CN (Y) are called "nervus intermedius" due to their sandwiched position in (Z).

X = SVE
Y = 7
Z = internal auditory meatus (between CN VIII and SVE branches of CN VII)

6

(Greater/lesser/deep) petrosal nerve branches off of nervus intermedius. It escapes through (X) landmark in the wall of (Y).

Greater;
X = hiatus for greater petrosal
Y = facial canal

7

T/F: Most of the facial nerve's path is within bone.

True

8

Chorda Tympani exits skull through (X) landmark, and enters which space?

X = petrotympanic fissure

Infratemporal fossa

9

Upon exiting hiatus for greater petrosal, the nerve enters (X) space and joins (Y) nerve.

X = middle cranial fossa
Y = deep petrosal (sympathetics)

10

Upon synapsing on (X) ganglion, the greater petrosal parasympathetic branches are distributed to:

X = pterygopalatine

1. Lacrimal gland
2. Nasal mucosa
3. Roof of mouth (mucosa and taste)

11

The (X) branch of facial nerve enters middle ear through (Y) and exits through (Z).

X = chorda tympani
Y = posterior canaliculus (for chorda tympani)
Z = anterior canaliculus (for chorda tympani)

12

As (X) branch of facial nerve courses through middle ear, it's directly posterior and in close proximity to (Y) structure(s) as it passes over (Z) muscle.

X = chorda tympani
Y = tympanic membrane and malleus bone
Z = tensor tympani

13

T/F: Chorda tympani is the only branch of facial nerve that carries taste fibers.

False - Greater Petrosal also (to roof of mouth)

14

GSA fibers of facial nerve have cell bodies in (X). Within (Y), they intersect/mix with branches from (Z).

X = geniculate ganglion
Y = facial canal
Z = CN X and XI

15

The GSA fibers that overlap to supply posterior ear auricle area travel together and exit via (X). Which CNs are involved?

X = tympanomastoid fissure

CN VII, IX, X