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PNS > Cranial Nerve 7. > Flashcards

Cranial Nerve 7. Flashcards

1
Q

What type(s) of fibers does the superior salivary nucleus contribute?

A

Preganglionic Parasympathetic

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2
Q

What type of fibers does the chorda tympani carry

A

Preganglionic Parasympathetic fibers AND taste fibers

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3
Q

What 3 nerves come off the geniculate ganglion?

A
  1. Greater Petrosal Nerve
  2. N. To the Stapedius
  3. Chorda Tympani
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4
Q

What structures does the greater petrosal nerve stimulate?

A
  1. Lacrimal gland
  2. Nasal gland
  3. Palatal gland
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5
Q

What are the branches the break off the posterior Auricular nerve?

A
  1. Occipital branch

2. Auricular branch

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6
Q

Posterior Auricular travels what way to the ear?

A

Posterior

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7
Q

Axons in the motor nucleus of the facial nerve travel through what ganglion?

A

Geniculate ganglion

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8
Q

Two roots are present at the apparent origin.

What are they?

A
  1. Motor root

2. Intermediate nerve

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9
Q

What branch of C.N. 7 motor division travels inferiorly?

A

Cervical branch

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10
Q

Does C.N. 7 carry motor, sensory, or mixed fibers?

A

Mixed

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11
Q

N. To the Stapedius supplies what muscle?

A

Stapedius

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12
Q

What 2 other branches does the temporal branch of C.N7 combine with to supply other muscles?

A
  1. Zygomaticotemporal nerve (V2)

2. Auriculotemporal branch (V3)

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13
Q

Taste information travels through _______ to terminate in________

A

Geniculate ganglion

Solitary Nucleus

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14
Q

What type of fibers does the greater petrosal nerve carry

A

Preganglionic Parasympathetic fibers

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15
Q

When the motor root and intermediate nerve leave the CNS they enter_____________ located in the _________________________

A

Internal acoustic meatus

Petrous part of the temporal bone

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16
Q

What nucleus does the motor nucleus travel around when exiting the CNS?

A

Abducens nucleus

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17
Q

What does the cervical branch supply?

A

Platysma

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18
Q

Motor nucleus receives information from what other structure?

A

Reticular formation

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19
Q

In what nucleus do sensory fibers terminate?

A

Solitary nucleus

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20
Q

What are the branches that come off the two trunks from the parotid plexus?

A

1.Temporal branches
2.Zygomatic branches
3.Buccal branches
4.Marginal mandibular branch
5.Cervical branch
(Three Zebras Bite My Mother’s Cantaloupes)

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21
Q

What does the stylohyoid branch supply?

A

Stylohyoid muscle

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22
Q

General sensation from what structures are carried to the geniculate ganglion?

A
  1. External ear

2. Lateral tympanic membrane

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23
Q

How many branches come off the facial nerve btwn the stylomastoid foramen.
What are they?

A

3

  1. Digastric branch
  2. Stylohyoid branch
  3. Posterior Auricular nerve
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24
Q

Zygomatic branches help supply what?

A

Orbicularis oris

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25
Q

True or False

Motor nucleus only recieves information from one cerebral hemisphere

A

False

It does receive from both

26
Q

Where are the cell bodies for the sensory neurons located?

A

Geniculate Ganglion

27
Q

True or False

The motor and intermediate roots never join together

A

False

They form one branch

28
Q

What type of fibers does the intermediate nerve carry?

A

Sensory and Parasympathetic fibers

29
Q

What is the pathway for the chorda tympani?

A
  1. Goes across the tympanic cavity
  2. Leaves the temporal bone thru pterygotympanic fissure
  3. Then combines with lingual nerve
30
Q

What is the other name for the greater petrosal nerve?

A

Superficial petrosal nerve

31
Q

In the motor nucleus of the facial nerve, the nucleus supplying muscles in the_________ part of the face _______ information only from __________ cortex

A

Inferior
Receives
Contralateral

32
Q

What is the pathway for the greater petrosal N.?

A
  1. Comes off geniculate ganglion
  2. Travels anteriorward through hiatus of greater petrosal nerve
  3. Re-enters petrous part of the temporal bone thru the foremen lacerum
  4. Travels in the pterygoid canal
  5. Thus joining the pterygopalatine ganglion
33
Q

True or False

Sensory fibers terminate in the upper part of the solitary nucleus

A

True

34
Q

True or False

Motor nucleus first travels anteriorly when exiting the CNS?

A

False

Posteriorly

35
Q

What does the digastric branch supply?

A

Posterior belly of the digastric muscle

36
Q

The Parotid plexus gives rise to what two trunks?

A
  1. Temporofacial

2. Cervicofacial

37
Q

Chorda tympani combines with what branch of C.N 5

A

Mandibular division

38
Q

What is another name for the motor root

A

Facial nerve proper

39
Q

What type of motor neurons are carried in the motor nucleus of the facial nerve?

A

LOWER MOTOR NEURONS

Remember this ALWAYS!😉

40
Q

The nerve that enter the parotid gland forms what?

A

Parotid plexus

41
Q

Preganglionic parasympathetic fibers from the superior salivary nucleus synapse in what 2 ganglions?

A

Either-Or

  1. Pterygopalatine ganglion
  2. Submandibular ganglion
42
Q

When temporal branch of C.N.7 combines with the other two nerves what muscles do they supply?

A
  1. Obicularis oculi
  2. Corruator supercilii
  3. Frontal belly of the occipitofrontalis
43
Q

What does the 5 branches from the parotid plexus in the C.N 7 nerve supply?

A

The muscles for facial expression

44
Q

Geniculate ganglion general information neurons send axons to what nucleus?

A

Solitary nucleus

45
Q

The new single trunk formed from the two roots enters_________
Bends____________ forming the ______________?

A

Facial canal
Posteriorly
External genu

46
Q

True or False

Motor nucleus is a secondary nucleus of origin.

A

False

Primary

47
Q

What nerve combines with the trigeminal nerve?

A

Chorda tympani

48
Q

What is the apparent origin for the facial nerve?

A

Cerrebellopontine sulcus

49
Q

Postganglionic fibers supply what gland(s)?

A
  1. Lacrimal
  2. Submandibular
  3. Sublingual
  4. (Small glands in oral and nasal cavities)
50
Q

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

A

N. To the Stapedius

51
Q

What is the other name for C.N. 7?

A

Nerve of Facial Expression

52
Q

What are the clinical considerations for the C.N. 7?

A
  1. Bell’s Palsy- face droop

2. Superficial Parotidectomy

53
Q

Geniculate ganglion is located where?

A

In the external genu of the facial nerve

54
Q

What does the temporal branch ALONE supply?

A

1.Intrinsic Auricular muscles

2&3.Superior and Anterior Auricular muscles-extrinsic muscles

55
Q

Specific fibers that convey taste from _____ part of tongue are carried in the ________

A

Anterior

Chords tympani

56
Q

What does the buccal branches supply?

A
  1. Buccinator
  2. Orbicularis oris
  3. Levator Anguli oris
57
Q

What is the name of the primary nucleus of origin?

A

Motor nucleus of the facial nerve

58
Q

What is the name for C.N.7?

A

Facial nerve

59
Q

True or False

The stapedius is the smallest muscle in the body.

A

True

60
Q

What type of fibers from C.N. 7 leave through the styloidmastoid foramen?

A

Motor or somatosensory fibers

61
Q

What does the marginal mandibular branch supply?

A

Risorious and muscles of chin and lower lip

PNS (7 decks)

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