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PNS > Unit III - C.N.VII - Facial Nerve > Flashcards

Unit III - C.N.VII - Facial Nerve Flashcards

1
Q

What type of fibers does the facial nerve carry?

A

Motor and sensory

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2
Q

Because it carries both sensory and motor fibers it is considered what type of nerve?

A

mixed

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3
Q

What is the facial nerve known as?

A

“Nerve of facial expression”

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4
Q

What types of sensory does it have?

A

Special and general sensory

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5
Q

What type of special sensory does facial nerve have?

A

Taste

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6
Q

What is the primary nucleus of origin for the facial nerve?

A

Motor nucleus of the facial nerve

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7
Q

What other nucleus contributes fibers to the facial nerve?

A

Superior salivary nucleus

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8
Q

What types of fibers does the superior salivary nucleus contribute to the facial nerve?

A

Preganglionic parasympathetic fibers

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9
Q

Sensory fibers carried in the facial nerve terminate where?

A

Upper part of the solitary nucleus

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10
Q

Where are the cell bodies of the sensory (both special and general) neurons found?

A

Geniculate ganglion

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11
Q

Sensory pathway - General sensation from what is carried to the geniculate ganglion?

A

External ear and

Lateral tympanic membrane

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12
Q

Axons from the external ear and lateral tympanic membrane carry information to where?

A

Solitary nucleus

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13
Q

Taste information also travels thought neurons with cell bodies found in the ________ and terminates in the _______.

A

Geniculate ganglion

Solitary nucleus

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14
Q

Specific fibers that convey taste from the _________ are carried in the ________.

A

Anterior part of the tongue

Chorda tympani

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15
Q

Axons from _____ in the motor nucleus of the facial nerve exit the CNS, travel through the _______ and innervate the muscle of _______.

A

LMN
Geniculate ganglion
Facial expression

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16
Q

The motor nucleus of the facial nerve receives information from ________.

A

Both cerebral hemispheres

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17
Q

The part of the nucleus supplying muscle in the inferior part of the face receives information from?

A

ONLY the contralateral cortex

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18
Q

The motor nucleus also receives information from the?

A

Reticular formation

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19
Q

Preganglionic parasympathetic fibers from the superior salivary nucleus synapse in either the ______ or the ______.

A

Pterygopalatine ganglion

submandibular ganglion

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20
Q

Postganglionic fibers supply the _______, ______, and _____ glands, as well as small glands in the ____ and _____ cavities.

A

Lacrimal
Submandibular
Sublingual
Oral and nasal cavities

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21
Q

Where is the apparent origin of the facial nerve?

A

Laterally in the sulcus between pons and M.O.

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22
Q

Before exiting the CNS, fibers from the motor nucleus first travel _______ and arch around the ______.

A

posteriorly

Abducens nucleus

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23
Q

What two roots are present at the apparent origin?

A 
Motor root (facial nerve proper)
intermediate nerve/root:
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24
Q

The intermediate root present at the apparent origin carries what type of fibers?

A

Sensory and parasympathetic

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25
Q

Upon exiting the CNS, both roots travel _______ and enter the ____________, located in the _______.

A

Together
Internal acoustic meats
Patrons part of the temporal bone

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26
Q

After entering the internal acoustic meats, the roots _______, and enter the _____ and then bend posteriorly, forming the __________ of the facial nerve

A

combine to form a single trunk
Facial canal
External genu

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27
Q

Where is the geniculate ganglion located?

A

In the external genu of facial canal

28
Q

What three nerves are given off in the facial canal?

A

Greater petrosal nerve
Nerve to the stapedius
Chorda tympani

29
Q

When the greater petrosal nerve comes off of the geniculate ganglion, it travels anteriorward through what?

A

The hiatus for the greater petrosal nerve

30
Q

The greater petrosal nerve re-enters the petrous part of the temporal bone through what opening?

A

Foramen lacerum

31
Q

After entering the foramen lacerum, the greater petrosal nerve travels in the _________ and ultimately joins the ________.

A

pterygoid canal

Pterygopalatine ganglion

32
Q

The greater petrosal nerve carries what type of fibers?

A

Preganglionic parasympathetic fibers

33
Q

The preganglionic parasympathetic fibers of the greater petrosal nerves stimulate secretions of what glands?

A

Lacrimal
Nasal
palatal

34
Q

The greater petrosal nerve also is called?

A

The superficial petrosal nerve

35
Q

What is the second nerve given off by the facial nerve?

A

Nerve to the stapedius

36
Q

Where is the nerve to the stapedius give off?

A

In the facial canal

37
Q

What does the nerve to the stapedius supply?

A

Stapedius muscle of the middle ear

38
Q

What is special about the stapedius?

A

Smallest muscle in the body

39
Q

What does the stapedius muscle do?

A

Stabilizes the shapes, providing protection of loud noises

40
Q

What is the third branch coming off of the facial nerve in the facial canal?

A

Chorda tympani

41
Q

What types of fibers does the chorda tympani fibers carry?

A

Preganglionic parasympathetic fibers and taste fibers

42
Q

Chorda tympanic traverses what?

A

The tympanic cavity

43
Q

The chords tympanic leaves the temporal bone through what?

A

pterygotympanic fissure

44
Q

After leaving the pterygotympanic fissure, the chorda tympani nerve combine with which nerve?

A

Lingual nerve

45
Q

The lingual nerve is a branch of what division of the trigeminal nerve?

A

Mandibular

46
Q

All remaining fibers after the three branches are given off are what type in nature?

A

Motor and somatosensory

47
Q

The remaining fibers after the three branches are given off exit temporal bone through what?

A

They stylomastoid foramen

48
Q

What are the three branches given off the facial btw the stylomastoid foremen and the parotid gland?

A

digastric branch
stylohyoid branch
Posterior articular nerve

49
Q

The digastric branch supplies what?

A

The superior belly of the digastric muscle

50
Q

The stylohyoid branch supplies what?

A

The stylohyoid muscle

51
Q

The posterior auricular nerve travel where?

A

Posterior to the ear

52
Q

The posterior auricular nerve divides into what two branches?

A

Occipital branch

auricular branch

53
Q

Occipital branch supplies what?

A

Occipital muscle

54
Q

Auricular branch supplies what?

A

Posterior auricular muscle

Intrinsic muscles of anterior part of ear

55
Q

After it gives off the fibers, again, it travels into which area?

A

The parotid gland

56
Q

In the parotid gland the facial nerve forms what?

A

The parotid plexus

57
Q

In the parotid gland, the plexus gives rise to two trunks:

A

temporofacial

cervicofacial

58
Q

From these two trunks rise to these five branches

A 
Temporal branch
Zygomatic branch
buccal branch
Marginal branch
Cervical branch
59
Q

These branches supply what?

A

Muscles of facial expression

60
Q

Temporal branch supplies what?

A

Intrinsic auricular muscles
Superior auricular muscles
Anterior auricular muscles

61
Q

In combination with the zygomaticotemporal (V2) and auriculotemporal (V3), they supply these muscles:

A

orbicularis oculi, corrugator supercili, and frontal belly of the occipitofrontalis

62
Q

Zygomatic branches help supply which muscle?

A

Orbicularis muscle

63
Q

Buccal branches supply several muscles including what?

A

buccinators, orbicularis oris, and levator anguli oris

64
Q

The cervical branch travels inferiorly to supply what?

A

platysma

65
Q

What is Bell’s Palsy?

A

Paralysis of facial nerve. Flaccidity of muscles on same side

66
Q

What is superficial partidectomy?

A

Surgical removal of the parotid gland.

67
Q

What can happen in a superficial parotidectomy?

A

May cut facial nerve and auriculotemporal (CN 5) and facial muscles will be affected.

PNS (15 decks)

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