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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
True or False | Motor nucleus only recieves information from one cerebral hemisphere
False | It does receive from both
26
Where are the cell bodies for the sensory neurons located?
Geniculate Ganglion
27
True or False | The motor and intermediate roots never join together
False | They form one branch
28
What type of fibers does the intermediate nerve carry?
Sensory and Parasympathetic fibers
29
What is the pathway for the chorda tympani?
1. Goes across the tympanic cavity 2. Leaves the temporal bone thru pterygotympanic fissure 3. Then combines with lingual nerve
30
What is the other name for the greater petrosal nerve?
Superficial petrosal nerve
31
In the motor nucleus of the facial nerve, the nucleus supplying muscles in the_________ part of the face _______ information only from __________ cortex
Inferior Receives Contralateral
32
What is the pathway for the greater petrosal N.?
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
True or False | Sensory fibers terminate in the upper part of the solitary nucleus
True
34
True or False | Motor nucleus first travels anteriorly when exiting the CNS?
False | Posteriorly
35
What does the digastric branch supply?
Posterior belly of the digastric muscle
36
The Parotid plexus gives rise to what two trunks?
1. Temporofacial | 2. Cervicofacial
37
Chorda tympani combines with what branch of C.N 5
Mandibular division
38
What is another name for the motor root
Facial nerve proper
39
What type of motor neurons are carried in the motor nucleus of the facial nerve?
LOWER MOTOR NEURONS Remember this ALWAYS!😉
40
The nerve that enter the parotid gland forms what?
Parotid plexus
41
Preganglionic parasympathetic fibers from the superior salivary nucleus synapse in what 2 ganglions?
Either-Or 1. Pterygopalatine ganglion 2. Submandibular ganglion
42
When temporal branch of C.N.7 combines with the other two nerves what muscles do they supply?
1. Obicularis oculi 2. Corruator supercilii 3. Frontal belly of the occipitofrontalis
43
What does the 5 branches from the parotid plexus in the C.N 7 nerve supply?
The muscles for facial expression
44
Geniculate ganglion general information neurons send axons to what nucleus?
Solitary nucleus
45
The new single trunk formed from the two roots enters_________ Bends____________ forming the ______________?
Facial canal Posteriorly External genu
46
True or False | Motor nucleus is a secondary nucleus of origin.
False | Primary
47
What nerve combines with the trigeminal nerve?
Chorda tympani
48
What is the apparent origin for the facial nerve?
Cerrebellopontine sulcus
49
Postganglionic fibers supply what gland(s)?
1. Lacrimal 2. Submandibular 3. Sublingual 4. (Small glands in oral and nasal cavities)
50
What nerve only contains motor fibers to leave the facial nerve in the facial canal?
N. To the Stapedius
51
What is the other name for C.N. 7?
Nerve of Facial Expression
52
What are the clinical considerations for the C.N. 7?
1. Bell’s Palsy- face droop | 2. Superficial Parotidectomy
53
Geniculate ganglion is located where?
In the external genu of the facial nerve
54
What does the temporal branch ALONE supply?
1.Intrinsic Auricular muscles | 2&3.Superior and Anterior Auricular muscles-extrinsic muscles
55
Specific fibers that convey taste from _____ part of tongue are carried in the ________
Anterior | Chords tympani
56
What does the buccal branches supply?
1. Buccinator 2. Orbicularis oris 3. Levator Anguli oris
57
What is the name of the primary nucleus of origin?
Motor nucleus of the facial nerve
58
What is the name for C.N.7?
Facial nerve
59
True or False | The stapedius is the smallest muscle in the body.
True
60
What type of fibers from C.N. 7 leave through the styloidmastoid foramen?
Motor or somatosensory fibers
61
What does the marginal mandibular branch supply?
Risorious and muscles of chin and lower lip

PNS (7 decks)

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