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PNS > Facial Nerve > Flashcards

Facial Nerve Flashcards

0
Q

The primary nucleus of origin for CN VII?

A

motor nucleus

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1
Q

What type of information is carried by CN VII?

A

motor and sensory fibers

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2
Q

what type of information is carried in the superior salivatory nucleus?

A

preganglionic parasympathetic

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3
Q

What is the special sensory function of CN VII?

A

taste on anterior 2/3 of tongue

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4
Q

sensory fibers carried in the facial nerve terminate?

A

upper part of the solitary nucleus

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5
Q

the cell bodies of the sensory neuron are found in

A

geniculate ganglion

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6
Q

Facial preganglionic parasymapthetic synpase with

A

Pterygopalatine and submandibular ganglion

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7
Q

General sensation from the external ear and lateral tympanic membrane are carried to____1_____. axons from these neurons carry information to the ____2__.

A

1- geniculate ganglion

2- solitary nucleus

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8
Q

taste information travels through neurons with cell bodies found in the ___1__ and is terminates in the ____2___.

A

1-geniculate ganglion

2- solitary nucleus

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9
Q

specific neurons carrying taste from the anterior 2/3 part of the tongue are found in

A

chorda tympani

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10
Q

the motor nucleus receives information from

A

both cerebral hemispheres

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11
Q

inferior part of the face receives information only from

A

the contralateral cortex

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12
Q

the motor nucleus receives information from

A

reticular formation

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13
Q

Preganglionic parasympathetic fibers from the superior salivatory nucleus synpase in

A

either the pterygopalatine ganglion or the submandibular ganglion

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14
Q

postganglionic fiber supply

A

the lacrimal gland, submandibular and sublingual gland as well as small glans in the oral and nasal cavities

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15
Q

the apparent origin of CN VII

A

junction of Pons and Medulla oblongata, lateral to CN VI and medial to CN VIII

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16
Q

before existing the CNS, fibers from the motor nucleus

A

first travel posteriorly and arch around the abducens nucleus

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17
Q

What two roots are present at the apparent origin

A

1-motor root ( facial nerve proper)

2- intermediate nerve (lateral to motor root)

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18
Q

the intermediate nerve carries what type of info

A

sensory and parasympathetic

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19
Q

where do the two roots go after existing the CNS

A

internal acoustic meatus

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20
Q

where is the internal acoustic meatus located

A

the petrous part of the temporal bone

21
Q

where is the geniculate ganglion located

A

after the facial canal and bends posteriorly forming the external genu of the facial nerve

22
Q

what nerve comes off the geniculate ganglion and travels anteriorward

A

greater petrosal nerve

23
Q

the greater petrosal nerve re-enters the petrous part of the temporal bone through the

A

foramen lacerum

24
Q

traveling in the pterygoid canal the greater petrosal nerve joins up with

A

pterygopalatine ganglion

25
Q

what type of information is carried by the greater petrosal nerve

A

preganglionic parasympathetic

26
Q

the greater petrosal nerve will stimulate secretion of

A

lacrimal, nasal, and palatal glands

27
Q

what is another name for the greater petrosal nerve

A

superficial petrosal nerve

28
Q

what is the second nerve given off by the facial nerve in the facial canal

A

nerve to the stapedius

29
Q

the nerve to the stapedius only carries

A

motor fibers

30
Q

nerve to the stapedius supplies the stapedius muscle, what is the action of this muscle?

A

stabilize the stapes, provide protection from loud noises primarily our own voice

31
Q

what is the third branch coming off the facial nerve in the facial canal

A

the chorda tympani

32
Q

the chorda tympani carries what type of information

A

preganglionic parasympathetic fibers and taste fibers

33
Q

the chorda tympani traverses the tympanic cavity and leave the temporal bone through the

A

pterygotympanic fissure

34
Q

what does the chorda tympani combine with

A

the lingual nerve, a branch of the mandibular division of the trigeminal nerve

35
Q

what other foramen does the remaining fibers of the facial nerve pass through

A

stylomastiod foramen

36
Q

the facial gives off three branches between the stylomastiod foramen and the parotid gland what are they.

A

the digastric branch, stylohyoid branch, posterior auricular nerve

37
Q

the digastric branch supplies what

A

the posterior belly of the digastric muscle

38
Q

the stylohyoid branch supplies the

A

stylohyoid muscle

39
Q

the posterior auricular nerve has two branch what are they

A

the occipital branch, auricular branch

40
Q

the occipital branch supplies the

A

occipital muscle and is the larger one

41
Q

the auricular branch supplies

A

the posterior auricular muscles, and the intrinsic muscles of the outer part of the ear

42
Q

once the facial nerve enters the parotid gland it forms the parotid plexus and what two trunks

A

temporofacial, cervicofacial

43
Q

what are the five branches given off by the facial nerve after the two trunks

A

temporal branch, zygomatic branch, buccal branch, marginal mandibular branch, cervical branch

44
Q

temporal branch supply what

A

intrinsic auricular muscles, superior and anterior auricular muscles

45
Q

what branches come together to supply the orbicularis oculi, corrugator supercilii, and frontal belly of the occipitofrontalis

A

temporal branches, auriculotemporal (V3), and zygomaticotemporal nerve (V2)

46
Q

what supplies the orbicularis oculi?

A

zygomatic branched of the parotid plexus

47
Q

Buccal branches supply what muscles

A

buccinator, orbicularis oris and levator anguli oris

48
Q

these branch supplies the Risorius, and muscles of the chin and lower lip; it may join with the mental nerve of (V3)

A

marginal mandibular branch

49
Q

what travels inferiorly to supply the platysma

A

cervical branch

50
Q

unilateral paralysis of the facial nerve, can develop overnight and resolve in 3wks 12-18 mo for a full recovery

A

Bell’s Palsy

51
Q

removal of the parotid gland, making the facial n. vulnerable; usually due to a tumor

A

superficial parotidectomy

PNS (6 decks)

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