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PNS > Facial Nerve > Flashcards

Facial Nerve Flashcards

1
Q

What type of fibers are carried by CN VII?

A

motor and sensory

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2
Q

T/F: CN VII is know as “the great sensory nerve of the face.”

A

False; it is the “nerve of facial expression.”

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3
Q

What is the primary nucleus of origin for CN VII?

A

motor nucleus of the facial nerve

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4
Q

What does the superior salivatory nucleus contribute tot the facial nerve?

A

pregnglionic parasympathetic fibers

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5
Q

Where do sensory fibers carried in the facial nerve terminate?

A

upper part of the solitary nucleus

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6
Q

What is the other name for the solitary nucleus?

A

nucleus solitarius

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7
Q

Where are the cell bodies of the sensory neruons found for CN VII?

A

genniculate ganglion

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8
Q

What is the proper name for the eardrum?

A

lateral tympanic membrane

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9
Q

Where is general sensation from the external ear and lateral tympanic membrane carried to?

A

geniculate ganglion

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10
Q

Sensory information delivered to the solitary nucleus come from axons from where?

A

geniculate ganglion

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11
Q

Other than general sensation, neurons with cell bodies located in the geniculate ganglion also carry what kind of information?

A

taste

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12
Q

Where do sensory neurons with cell bodies located in the geniculate ganglion terminate?

A

Solitary nucleus

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13
Q

What part of the tongue do the neurons in the chorda tympani carry info from?

A

anterior 2/3

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14
Q

What structure divides the tongue into an anterior 2/3 and posterior 1/3?

A

sulcus terminalis

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15
Q

T/F: axons in the motor nucleus of the facial nerve that travel throught the geniculate ganglion are upper motor neurons.

A

False; these are lower motor neurons

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16
Q

Which cerebral hemisphere sends information to the motor nucleus of CN VII?

A

both

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17
Q

What part of the face receives motor info ONLY from the contralateral cortex?

A

inferior part

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18
Q

T/F: the reticular formation sends info to motor nucleus, of CN VII.

A

True

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19
Q

Where do preganglionic parasympathetic fibers from the superior salivatory nucleus synapse?

A

either the pterygopalatine ganglion or the submandibular ganglion.

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20
Q

What kind of fibers from the superior salivatory nucleus synapse in the pterygopalatine ganglion?

A

preganglionic parasympathetic

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21
Q

Postganglionic fibers in the parasympathetic pathway of CN VII supply several gland. What specific glands were mentioned in class?

A

lacrimal, submandibular, sublingual and small glands in the oral and nasal cavities.

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22
Q

What is the apparent origin of the Facial nerve?

A

laterally in the sulcus between the pons and medulla oblongata; near the cerebellopontine recess

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23
Q

Before exiting the CNS, fibers from the motor nucleus of the facial nerve travel where?

A

posteriorly and arch around the abducens nucleus

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24
Q

What two roots are present at the apparent origin of CN VII

A

Motor root and intermediate nerve/root

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25
Q

what is another name for the motor root of the facial nerve?

A

facial nerve proper

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26
Q

What kind of fibers are carried by the intermediate nerve of CN VII?

A

sensory and parasympathetic

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27
Q

Upon exiting the CNS, both roots of CN VII travel together and enter what opening?

A

internal acoustic meatus

28
Q

Where is the internal acoustic meatus located?

A

the petrous part of the temporal bone

29
Q

What nerve comes off the geniculate ganglion and travels anteriorward?

A

the greater petrosal nerve

30
Q

What opening does he greater petrosal nerve travel through after coming off the geniculate ganglion?

A

hiatus for the greater petrosal nerve

31
Q

Where does the greater petrosal nerve reenter the petrous part of the temporal bone?

A

formen lacerum

32
Q

What nerver travels through the pterygoid canal to ultimately join the pterygopalatine ganglion?

A

greater petrosal nerve

33
Q

What kind of fibers does the greater petrosal nerve carry?

A

preganglionic parasympathetic fibers

34
Q

What glands does the greater petrosal nerv stimulate secretions for?

A

lacrimal, nasal and palatal glands

35
Q

What is the other accepted name for the greater petrosal nerve?

A

superior petrosal nerve

36
Q

What is the second nerve given off of the facial nerve inside the facial canal?

A

the nerve to stapedius

37
Q

What nerve innervates the stapedius?

A

nerve to the stapedius

38
Q

What nerve contains the only motor fibers that leave the facial nerve in the facial canal?

A

nerve to stapedius

39
Q

Where is the stapedius located?

A

the middle ear

40
Q

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

A

chorda tympani

41
Q

What kind of fibers are carried by the chorda tympani?

A

preganglionic parasympathetic fibers and taste fibers

42
Q

What cavity does the chorda tympani traverse?

A

tympanic cavity

43
Q

Where does the chorda tympani exit the temporal bone?

A

pterygopalatine fissure

44
Q

Whaat nerve does tthe chorda tympani combine with after exiting the temporal bone?

A

the lingual nerve of the the mandibular division

45
Q

What kind of fibers associated with the facial nerve exit the stylomastoid foramen?

A

motor and somatosensory

46
Q

How many branches come off of the facial nerve between the stylomastoid foramen and the parotid gland?

A

3

47
Q

What are the branches that come off of the facial nerve between the stylomastoid foramen and the parotid gland?

A

digastric branch, stylohyoid branch and posterior auricular nerve

48
Q

What nerve supplies the posterior belly of the digastric muscle?

A

the digastric branch of the facial nerve

49
Q

What nerve innervates the stylohyoid muscle?

A

stylohyoid branch

50
Q

In addition to motor fibers, what other fibers are carried by tthe digastric and stylohyoid branches?

A

proprioceptive fibers

51
Q

What branch of the facial nerve travels posterior to the ear?

A

the posterior auricular nerve

52
Q

What are the two branches of the posterior auricular nerve?

A

occipital branch and auricular branch

53
Q

T/F: all autonomic fibers carried in CN VII are given off inside of the facial canal.

A

True

54
Q

What are the two trunks that arise from the parotid plexus?

A

temporofacial and cervicofacial

55
Q

What are the five branches of the two trunks which arise from the parotid plexus?

A

Temporal, zygomatic, buccal,marginal mandibular, and cervical branches (ten zebras bit my mother’s cheek)

56
Q

What is innervated by the parotid plexus?

A

muscles of facial expression

57
Q

What nerve of the parotid plexus innervates the intrinsic auricular muscles?

A

temporal branch

58
Q

what nerve of the parotid plexus innervates the superior and anterior auricular muscles?

A

Temporal branch

59
Q

What nerve(s) innervate the orbicularis oculi, corrugator supercilli, and frontal belly of the occipitofrontalis?

A

the temporal branch of the parotid plexus in combination with the zygomaticotemporal nerve (V2) and the auriculotemporal branch (V3)

60
Q

What do the zygomatic branches help supply?

A

orbicularis oculi

61
Q

What muscles are innervated by the buccal branches of the parotid plexus?

A

buccinator, orbicularis oris, and levator anguli oris

62
Q

If the temporal branch supplies motor innervation to the orbicularis ocul, corrugator supercilii, and frontal belly of occipitofrontalis, what nerves supply the sensory info?

A

zygomaticotemporal nerve (V2) and auriculotemporal branch (V3)

63
Q

what muscles are innervated by the marginal mandibular branch of the parotid plexus?

A

risorius and muscles of the lower lip/chin.

64
Q

What branch of the parotid plexus may join up with the mentl nerve?

A

marginal mandibular branch

65
Q

What does the cervical branch innervate?

A

platysma

66
Q

This clinical consideration may appear very similar to a stroke but is localized to only the face. One side of the face will be without expression; unkown cause typically; can last months. What is this called?

A

Bell’s Palsy

67
Q

What surgery is particularly dangerous with regard to the parotid plexus?

A

Superficial parotidectomy

PNS (43 decks)

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