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SP14 Anatomy > EX3 Neuro - CN V and VII > Flashcards

EX3 Neuro - CN V and VII Flashcards

1
Q

In which nucleus would you find the SVE component of the facial nerve

A

facial motor nucleus

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2
Q

In which nucleus would you find the GVE component of CN VII and what branch of autonomins

A

superior salivatory nucleus

parasympathetic

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3
Q

In which ganglion would you find the GVE component of CN VII

A

submandibular ganglion

pterygopalatine ganglion

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4
Q

In which nucleus would you find the GSA component of CN VII

A

trigeminal spinal nucleus

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5
Q

In which ganglion would you find the GSA component of CN VII

A

geniculate ganglion

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6
Q

In which nucleus would you find the SVA component of CN VII

A

solitary nucleus

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7
Q

In which ganglion would you find the SVA component of CN VII

A

geniculate ganglion

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8
Q

In which nucleus would you find the GVA component of CN VII

A

solitary nucleus

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9
Q

In which ganglion would you find the GVA component of CN VII

A

geniculate ganglion

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10
Q

How do the functional components of CN VII compare with CN IX and X

A

they are the same functional components

share the same cell body origin in the solitary nucleus (SVA) and trigeminal spinal nucleus (GSA)

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11
Q

This component of CN VII is responsible for the muscles of facial expression

A

SVE

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12
Q

This component of CN VII is responsible for the cranial parasympathetics

A

GVE

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13
Q

This component of CN VII is responsible for the skin of the ear; pain, touch, temperature

A

GSA

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14
Q

This component of CN VII is responsible for taste to the anterior 2/3 of the tongue

A

SVA

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15
Q

This component of CN VII is responsible for the visceral sensibility of the palatine tonsil and posterior nasal cavity

A

GVA

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16
Q

What makes up the facial nerve proper

A

SVE fibers

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17
Q

What makes up the nervus intermedius of VII

A

GVE and sensory fibers

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18
Q

What is the course of the facial nerve out of the skull

A

from the skull though stylomastoid foramen

pass through parotid gland where a plexus forms

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19
Q

This nucleus is the parasympathetic component in the nervus intermedius

A

superior salivatory nucleus

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20
Q

These nerve branches of CN VII are part of the parasympathetic component of nervus intermedius

A

greater petrosal

chroda tympani

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21
Q

The greater petrosal nerve is associated with which nucleus

A

pterygopalatine nucleus

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22
Q

The chroda tympani is associated with which nucleus

A

submandibular gland - salivation

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23
Q

This is responsible for closing the eye (closing lips)

opening the eye?

A

SVE; muscles of facial expression

opening = CN III

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24
Q

The stapedius muscle controlled by SVE does what

A

modulates sound volume

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25
Q

Salivation is controlled by what component

A

GVE

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26
Q

Lacrimation is controlled by what component

A

GVE - lubricates cornea

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27
Q

Which glands are innervated by CN VII

A

lacrimal
submandibular
sublingual

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28
Q

This is the irritation of the cornea and paresis (partial paralysis) of facial muscles above and below the eye (SVE)

A

Bell’s Palsy

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29
Q

What are some additional symptoms of Bell’s Palsy

A

hyperacusis (increased sensitivity to noise)
reduced lacrimation and salivation
crocodile tears
numbness or pain of the ear, tongue, or face

30
Q

What causes Bell’s Palsy

A

lesion of the facial nerve; acute facial nerve paralysis will be on the same side of the lesion

31
Q

What is the result of facial nerve paralysis involving Ball’s Palsy

A

paralysis is complete over half the face on same side of lesion

32
Q

What will result as a lesion to the facial nerve in the internal auditory canal

A

all facial nerve components run through the internal auditory canal, a lesion can damage all components (motor and sensory)

33
Q

What will result as a lesion to the facial nerve in the facial canal

A

lesion can damage all components (motor and sensory); chorda tympani/facial nerve branches
can also be damaged from periphery

34
Q

What will result as a lesion to the facial nerve in the stylomastoid foramen

A

damage/paralysis to the muscles of facial expression (SVE) and GSA (skin of ear)

35
Q

A lesion of the upper motor neuron in the corticobulbar tract results in this

A 
opposite side (contralateral)
weakness to the lower face and sparse weakness to upper face; eye movements not effected
36
Q

A lesion of the lower motor neuron in the facial nucleus results in what type of paralysis

A

ipsilateral; both lower and upper face affected; eye movements effected

37
Q

This is a result of the parasympathetic fibers to submandibular ganglion being re-routed to pterygopalatine ganglion

A

Crocodile tears; unilateral tearing in anticipation of, and during meals
history of Bell’s palsy

38
Q

This is a result of a surpanuclear lesion (above nucleus)

A

paralysis of muscles of facial expression below the level of the eye
opposite the lesion

39
Q

In which nucleus would you find the SVE component of CN V (cell body of origin)

A

trigeminal motor nucleus

40
Q

What is the cell body of origin /nucleus of the GSAp and GSAe component of CN V and where does it terminate

A

unipolar cell bodies; trigeminal mesencephalic nucleus (GSAp)
terminate - trigeminal spinal and principal (GSAe)

41
Q

What is unique about the GSA component of CN V (trigeminal mesencephalic nucleus)

A

Do not have cell bodies in spinal cord ganglia or cranial nerve ganglia

42
Q

What does the SVE component of trigeminal control

A

muscles of mastication

43
Q

What does the GSA component of trigeminal control

A

propriception of the muscles of mastication
pressure/tension of periodontal ligaments
sensation; skin of face, oronasal mucous membranes, teeth, dura mater, pain crude touch, temperature

44
Q

What are the three divisions of the trigeminal nerve

A

opthalmic (I)
maxillary (II)
mandibular (III)

45
Q

What region is served by the ophthalmic division of trigeminal

A

upper face

sensory only

46
Q

What region is served by the maxillary division of trigeminal

A 
middle face (above mouth, below eyes)
sensory only
47
Q

What region is served by the mandibular division of trigeminal

A

lower face

sensory and motor

48
Q

What cranial nerves besides trigeminal contribute axons to the trigeminal spinal tract and terminate in the trigeminal spinal nucleus (pars caudalis)

A

VII - ear
IX - ear
X - ear

49
Q

What is meant by the somatototopic organization of the trigeminal spinal tract

A

it means that there are clear divisions between the divisions of trigeminal; like an onion - a certain portion of the face is directly correlated tot a certain portion of the spinal tract/nucleus

50
Q

Where is the trigeminal mesencephalic nucleus found

A

rostral pons and mesencephalon adjacent to the ventricle

- midbrain

51
Q

Where is the trigeminal motor nucleus found

A

dorsolateral pontine tegmentum

- pons

52
Q

Where is the trigeminal spinal nucleus found

A

pons

53
Q

Where is the trigeminal principal sensory nucleus found

A

pons

54
Q

What are the two ascending projections from the trigeminal sensory nuclei (trigeminal spinal nucleus and trigemin pontine (principal) sensory nucleus)

A

ventral trigeminothalamic
dorsal trigeminothalamic
project to ventral posteriomedial nucleus (VPM)

55
Q

What is different about the ventral and dorsal trigeminothalamic pathways

A

ventral projects contralaterally to VPM; pain, touch temp
dorsal projects bilaterally to VPM; pressure, discriminatory touch
but both give off fibers to nearby reticular formation

56
Q

Where is the VPM located and project into

A

thalamas, projects into the post central gyrus

57
Q

This is the heavily myelinated homologue of the posterior column - medial lemniscal system; proprioception

A

trigeminal mesencephalic nucleus

58
Q

This is the heavily myelinated homologue of the posterior column - medial lemniscal system; discriminative touch

A

trigeminal principal nucleus

59
Q

This is the lightly myelinated homologue of the anteriolateral system; pain, crude touch, temperature

A

trigeminal spinal nucleus

60
Q

This stimulates the cornea and the ispsilteral eye closes

A

direct corneal reflex

61
Q

This stimulated the cornea and the contralateral eye closes

A

consensual corneal reflex

62
Q

The trigeminal nerve projects where to stimulate the cornea

A

trigeminal principal nucleus

trigeminal spinal nucleus

63
Q

Which trigeminal nucleus relays bilaterally to facial nucleus (involving corneal reflex)

A

trigeminal spinal nucleus

64
Q

What is the jaw-jerk reflex

A

the tapping of a persons jaw at the chin to test the trigeminal nerve innervating the masseter; myotatic

65
Q

This will cause the jaw-jerk reflex to become exaggerated

A

upper motor neuron lesion accentuates reflex

lower motor neuron lesion lessens reflex

66
Q

This is usually unilateral, excruciating, lancing (spontaneous) pain affecting the ophthalmic (<5%) and mandibular division

A

trigeminal neuralgia

67
Q

What can affect trigeminal neuralgia

A 
compression of nerve
trigger point
onset of middle age
often response to drug the ape
microvascular decompression may be effective
68
Q

What is trigeminal tractotomy

A

the severing or transection of the trigeminal nerve to relieve pain

69
Q

This regions of the trigeminal spinal nucleus involves input from the oral cavity

A

pars oralis

70
Q

This region of the trigemninal spinal nucleus involves input from the trigeminal autonomic reflex

A

pars interpolarsi

71
Q

This region os the trigeminal spinal nuclues is important in pain processing

A

pars caudalis

SP14 Anatomy (33 decks)

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