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PNS > Cranial Nerve 5. > Flashcards

Cranial Nerve 5. Flashcards

1
Q

True or False

Trigeminal nerve is the smallest CN

A

False it is the largest

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2
Q

Is CN 5 a sensory, motor, or mixed nerve type.

A

Mixed

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3
Q

Does CN 5 have more sensory fibers or motor fibers?

A

Sensory

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4
Q

What is the nickname for CN 5

A

Great Sensory Nerve of the Face

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5
Q

How many nuclues(I) are associated with CN5?

What are they?

A

3

  1. Main sensory nucleus
  2. Spinal Nucleus
  3. Trigeminal mesencephalic nucleus
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6
Q

How many nuclues(I) of origin are associated with CN5

A

1

Trigeminal motor nucleus

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7
Q

How many peripheral ganglion are associated with C.N. 5?

What is the(ir) name?

A

Trigeminal (semilunar) ganglion

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8
Q

What cell bodies are located in the trigeminal ganglion?

A

Primary sensory nureons

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9
Q

What are the three branches that given off by the trigeminal nerve?

A

Ophthalmic
Maxillary
Mandibular

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10
Q

What nuclei of termination are combined together in the sensory pathway?

A

Main and spinal nuclei

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11
Q

Where are the cell bodies located for main and spinal nuclei

A

In trigeminal ganglion

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12
Q

Peripheral processes from the main and spinal pathway come from ___________to enter_________

A

The face

Trigeminal ganglion

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13
Q

What processes go toward main and spinal nuclei?

A

Central

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14
Q

Main trigeminal nuclei gets what type of information sent to it?

A

Touch
Vibration
Joint propioception

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15
Q

Spinal nuclei gets what type of sensation sent to it?

A

Pain

Temperature

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16
Q

What is the analogous cord pathway for spinal nuclei?

A

Lateral spinothalamic

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17
Q

What is the analogous cord pathway for the main nuclei

A

Gracilis
Cuneatous
Anterior spinothalamic

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18
Q

What nucleus’ dendrites pass thru the trigeminal ganglion?(does not synapse in there)

A

Mesencephalic nucleus

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19
Q

What nucleus has the only primary sensory neurons that have cell bodies located in the CNS? TQ

A

Mesencephalic

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20
Q

What is the only branch that carries motor fibers?

A

Mandibular branch

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21
Q

Motor nucleus axons are carried in what branch?

A

Mandibular branch

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22
Q

The motor nucleus RECEIVES information from what structures?

A 
Cerebral cortex (both hemispheres)
Reticular formation
Red nucleus
Tectum
Medial longitudinal fascicles
Mesencephalic nucleus
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23
Q

What type of info does mesencephalic get?

A

Propioceptive info

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24
Q

What type of reflex does mesencephalic nucleus have

A

Monosynaptic

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25
Q

What is the apparent origin for C.N.5?

A

Lateral aspect of the pons

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26
Q

C.N.5 travels_______ over___________ and enters________, the __________

A

Anteriorward
The petrous part of the temporal bone
A pouch of dura
Trigeminal cave

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27
Q

What is another name for the trigeminal cave?

A

Meckel’s Cave

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28
Q

What is located in the Trigeminal Cave?

A

Trigeminal ganglion

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29
Q

Where do the 3 branches of C.N. 5 arise from?

A

Trigeminal ganglion

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30
Q

Ophthalmic division enters _______________ via ________________

A

The orbit

Superior orbital fissure

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31
Q

What other C.N. enter the skull like the ophthalmic division?

A

3
4
6

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32
Q

Does the ophthalmic division carry motor or sensory fibers?

A

Sensory

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33
Q

Ophthalmic carries sensation from what?

A

Skin over

  1. Nose
  2. Forehead
  3. Scalp

Mucous membranes

  1. Frontal sinus
  2. Sphenoid sinus

Membrane covering nasal septum

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34
Q

Ophthalmic division gives rise to how many branches and what are their names?

A 
4
Meningeal nerve
Lacrimal nerve
Frontal nerve
Nasociliary nerve
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35
Q

What is the other name given to the meningeal nerve?

A

Tentorial branch

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36
Q

Where is the meningeal nerve given off from the ophthalmic division?

A

Before it leaves the superior orbital fissure

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37
Q

What does the meningeal never supply?

A

Dura mater lining the middle cranial fossa

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38
Q

True or false

Lacrimal nerve is the biggest branch the ophthalmic division gives off.

A

False

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39
Q

What is the pathway of the lacrimal nerve?

A

Travels along superior aspect of lateral rectus muscle
Passes thru lacrimal gland
Reaches the skin of upper eyelid

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40
Q

What does the lacrimal nerve supply?

A

Lacrimal gland

Skin of the upper eyelid

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41
Q

What other type of fibers does the lacrimal nerve send to the lacrimal gland

A

Parasympathetic (secretory) fibers

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42
Q

How does the other type of fibers from the lacrimal nerve get to the lacrimal gland?

A

Parasympathetic fibers originate from pterygopalatine ganglion (VII) reach lacrimal nerve by of the zygomatic nerve and zygomaticotemporal nerves (C.N. V2)

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43
Q

True or False

Frontal branch is the biggest branch in the ophthalmic division.

A

True

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44
Q

Frontal nerve divides into two branches what are they?

A

Supratrochlear nerve

Supraorbital nerve

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45
Q

Supratrochlear nerve conveys sensation from what structure?

A

Medial corner of the eye

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46
Q

Supraorbital nerve carries sensation from what structures?

A
  1. Conjunctiva
  2. Upper eyelid
  3. Forehead
  4. Mucous membrane from frontal sinus
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47
Q

True or False

Nasociliary has the most branches coming off of it in the ophthalmic division?

A

True

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48
Q

Nasociliary has how many main branches and how many terminal branches?
What are their names?

A

3 Main branches

  1. Communicating branch
  2. Long Ciliary nerve
  3. Posterior Ethmoid nerve

2 Terminal branches

  1. Anterior ethmoid nerve
  2. Infratrochlear nerve
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49
Q

Where does the communicating branch go to?

A

Ciliary ganglion

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50
Q

Communicating branch helps with what?

A

Corneal reflex

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51
Q

Long ciliary nerve supplies what structure?

A

The eyeball

52
Q

Posterior ethmoid nerves carries sensory information from what structures?

A

Sphenoidal sinus

Ethmoidal sinus

53
Q

Anterior ethmoid divides into two nerves. What are they?

A

External nasal nerve

Internal nasal nerve

54
Q

External nasal nerve supplies what?

A

Skin over the nose

55
Q

Internal nasal nerve supplies what structure?

A

Mucus membrane covering the anterior part of the nasal septum

56
Q

What does the infratrochlear nerve supplies what?

A

Medial corner of the eye

Lacrimal sac

57
Q

Maxillary Division enters the ____________ through the____________.

A 
Pterygopalatine fossa
Foramen rotundum (round foramen)
58
Q

True or False

Maxillary division is the only branch with motor fibers.

A

False

Mandibular branch

59
Q

Maxillary division carries sensation from what structures?

A

The skin

  1. Btwn Eyes and Mouth
  2. Over Cheeks and Temples

Mucosa Lining

  1. Maxilary sinus
  2. Nasal Conchae
  3. Palate
  4. Gingiva
60
Q

What are the branches that the Maxillary Division gives off?

A
  1. Middle Meningeal N.
  2. Zygomatic N
  3. Ganglionic Branches
  4. Infraorbital N.
61
Q

What nerve is given off before the Maxillary nerve leaves the round foramen?

A

Middle meningeal N.

62
Q

What does the middle meningeal supply?

A

The meninges of the middle cranial fossa

63
Q

Zygomatic nerve enters the _______ thru the_________________.

A

Orbit

Inferior orbital fissure

64
Q

What are the nerves that come off the zygomatic nerve?

A
  1. Communicating Branch
  2. Zygomaticotemporal Branch
  3. Zygomaticofemoral
65
Q

Communicating branch from zygomatic nerve carries what type of fibers?

A

Postganglionic Parasympathetic fibers

66
Q

Communicating branch of zygomatic nerve carries fibers from ________ going to _____________.

A

Pterygopalatine ganglion

Lacrimal gland

67
Q

Zygomaticotemporal nerve supplies what?

A

Skin over the temple

68
Q

Zygomaticofacial supplies what?

A

Skin over the cheek

69
Q

Ganglionic branches carry sensory information from where?

A

Upper pharynx
Nasal cavity
Palate

70
Q

True or False

Ganglionic branches sensory information pass thru the geniculate ganglion to the maxillary division.

A

False

Pterygopalatine ganglion

71
Q

Infraorbital nerve travels thru what 2 structures?

A

Infraorbital fissure

Infraorbital Canal

72
Q

What does the infraorbital nerve supply?

A

Lower eyelid
Skin over the upper jaw
Maxillary sinus

73
Q

Infraorbital nerves gives off 3 nerves, what are they?

A

Anterior Superior Alveolar N.
Middle Superior Alveolar N.
Posterior Superior Alveolar N.

74
Q

What plexus is found just above the alveoli?

A

Superior dental plexus

75
Q

What type of fibers from the Maxillary division are used to distribute from the pterygopalatine ganglion?

A

Postganglionic Parasympathetic fibers

76
Q

What type of fibers reach the pterygopalatine ganglion from the greater petrosal nerve?

A

Preganglionic Parasympathetic fibers

77
Q

What type of fibers from the Superior Cervical ganglion pass thru the pterygopalatine ganglion

A

Postganglionic sympathetic fibers

78
Q

True or False

The sensory root is Large in the Mandibular division

A

True

79
Q

True or False

The motor root is large in the mandibular division

A

False

Small

80
Q

True or False

The Mandibular division is only motor

A

False

Both sensory and motor

81
Q

True or False

The motor and sensory root of the Mandibular division exit the foramen ovale as one root

A

False

Two separate roots and combine later

82
Q

Where does the sensory and motor root combine in the Mandibular division?

A

Infratemporal fossa

83
Q

Mandibular division carries sensory information from what structures?

A

Skin over the

  1. Mandible
  2. Posterior cheek
  3. Posterior temple

Mucosa of the

  1. Lower oral cavity
  2. Cheek
84
Q

How many muscles are innervated by the Mandibular division and what are these Group of muscles called?

A

8

Muscles of mastication

85
Q

What are the muscles innervated by the Mandibular division?

A
  1. Masseter
  2. Temoralis
  3. Medial Pterygoid
  4. Lateral Pterygoid
  5. Tensor Veli Palatini
  6. Tensor Tympani
  7. Mylohyoid
  8. Anterior belly of Digastric
86
Q

Two branches are given off in the infratemporal fossa what are they?

A

Recurrent Meningeal Branch

Medial Pterygoid N.

87
Q

Where are the Recurrent Meningeal Branch and the Medial Pterygoid N. Given off in the Mandibular division?

A

Infratemporal fossa

88
Q

What is another name for the Recurrent Meningeal Branch?

A

Nervus Spinosum

89
Q

Where does the Recurrent Meningeal Branch enter the cranium thru?

A

Foramen Spinosum

90
Q

Recurrent Meningeal Branch is sensory or motor or both?

A

Sensory

91
Q

Where does the Recurrent Meningeal Branch carry info from?

A

Dura of the

  1. MiddleCranial Fossa
  2. Anterior cranial Fossa
  3. Calvarium
92
Q

Is the Medial Pterygoid N. Sensory, motor or mixed?

A

Motor

93
Q

What does the Medial Pterygoid N. supply?

A

Medial Pterygoid
Tensor Veli Palatine
Tensor Typani

94
Q

What’s special about the fibers from the Medial Pterygoid N. That supply’s the Tensor Veli Palatine and Tensor Tympani?

A

They pass thru the optic ganglion

95
Q

What type of nerve fibers does the optic ganglion send out?

A

Postganglionic Parasympathetic fibers

96
Q

In the Mandibular Division after the 2 branches are given the nerve divides into predominantly 2 divisions. What are the two division it breaks into?

A

Motor Anterior Division

Sensory Posterior Division

97
Q

What nerves does the Anterior Division of the Mandibular Nerve give rise to?

A
  1. Masseter
  2. Deep Temporal
  3. Lateral Pterygoid
  4. Buccal
98
Q

What nerve in the Anterior Division in the Mandibular division is the Major sensory branch in the division?

A

Buccal

99
Q

What nerves give sensory info in the Anterior Division in the Mandibular division

A

Buccal

Masseter (he’s special, cause he’s also motor…super cute)

100
Q

What is special about the Masseter N.?

A

The nerve is both motor and sensory (#mixed)

101
Q

What does the Masseter N supply?

A

Motor function to Masseter

Sensory info from tempromandibular joint (TMJ)

102
Q

Lateral Pterygoid supplies what?

A 
Lateral Pterygoid
(Medial Pterygoid N. does more work)
103
Q

What is special about the Deep temporal nerve?

A

It splits into two branches

Ant. And Post.

104
Q

What does the deep temporal n. supply?

A

Both branches of this n. (Ant and Post.) supply Temporalis muscle

105
Q

Buccal nerve conveys sensation from what?

A
  1. The cheek

2. The Buccal gingival of the molars

106
Q

What are the nerves given off in the Posterior division of the Mandibular Division?

A
  1. Auriculotemporal
  2. Lingual
  3. Inf. Alveolar
107
Q

What nerves also has motor function in the posterior division of the Mandibular division?

A

Auriculotemporal n. (Postganglionic Parasympathetic) (So small)
Inferior Alveolar n.

108
Q

What is the pathway of the Auriculotemporal n?

A

Passes thru the parotid gland, post to TMJ, and into the infratemporal fossa

109
Q

What does the Auriculotemporal N carry?

A

Sensory info from skin of the

  1. Temple
  2. Ear

Postganglionic Parasympathetic fibers from otic ganglion

110
Q

The lingual N covers info from what structure?

A

Mucosa of the oral cavity

111
Q

True or False

Lingual nerve combines with Cranial Nerve 7 in the infratemporal fossa

A

True

112
Q

What nerve does the lingual nerve combine with in the infratemporal fossa?

A

The chorda tympani

From C.N.7

113
Q

The inf. Alveolar n. carries sensory info from what structures?

A
  1. Lower teeth

2. Chin

114
Q

True or False

The inferior alveolar nerve has two branches.

A

True

115
Q

True or False

The lingual nerve has two branches.

A

False

116
Q

What are the two branches of the inf.alveolar n.?

A
  1. Incisive Branch

2. Mental N.

117
Q

Incisive Branch supplies what?

A
  1. Incisors
  2. Canines
  3. 1st premolars and adjacent gingival
118
Q

Mental nerve supplies what?

A
  1. Labial gingival adjacent to incisors

2. Skin of the lower lip

119
Q

What do the motor fibers do in the inf. alveolar n.?

A

Diverge from the n. Prior to passing thru the Mandibular foramen

120
Q

What does the motor fibers of the inf. alveolar n. supply?

A
  1. Mylohyoid

2. Ant. belly of the digastric Muscle

121
Q

What 2 autonomic ganglia communicate with the Mandibular division?

A

Submandibular

Otic

122
Q

What does the submandibular ganglia in the Mandibular division receive?

A

Preganglionic fibers from C.N7 by the lingual nerve AFTER it combines with chorda tympani

123
Q

What does the otic ganglion do in the Mandibular Division?

A

Send postganglionic fibers to parotid gland by the Auriculotemporal n.

124
Q

In some cases what else can the lingual nerve do?

A

Convey taste info (special sensory) to chorda tympani

125
Q

What is the clinical consideration you need know for the trigeminal nerve?

A

1.Trigeminal Neuralgia- Short burst of pain on one side of the face
(Tic Douloureux)
2.Dental consideration-top teeth:Can individually numb teeth
bottom teeth: Whole row of teeth are numbed

PNS (7 decks)

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