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Anatomy 2 Exam 1 > Cranial Nerves V & VII > Flashcards

Cranial Nerves V & VII Flashcards

1
Q

Where does the trigeminal nerve come off the brainstem?

A

Midlevel of the pons at the middle cerebral peduncle

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2
Q

Where does the acial nerve come of the brainstem

A

At the cerebellopontine angle, the junction between the pons and the cerebellum

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3
Q

What is the function of the trigeminal nerve?

A

Transmits tactile, proprioceptive, pain and temperature from the head to the cortex

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4
Q

What are the three divisions of the trigeminal nerve?

A

Opthalmic
Maxillary
Mandibular

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5
Q

What is the function of the Opthalmic division of the trigeminal nerve?

A

Sensory to the upper face

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6
Q

What is the function of the Maxillary division of the trigeminal nerve?

A

Sensory to the middle face

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7
Q

What is the function of the Mandibular division of the trigeminal nerve?

A

Sensory and motor to the lower face

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8
Q

The main sensory nucleus is responsible for what sensory functions?

A

Proprioception and two point tactile touch

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9
Q

Where does proprioception for the jaw originate/terminate in the CNS

A

Mesencephalic nucleus

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10
Q

The branchial motor nerve or the trigeminal nerve originates here

A

Trigeminal motor nucleus

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11
Q

Where does the brachial motor nerve of CN V go to?

A

Muscles of mastication

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12
Q

The trigeminal spinal nucleus of CN V is responsible for this

A

Pain

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13
Q

What nucleus of CN V is responsible for Two point tactile descrimination?

A

Main sensory nucleus

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14
Q

CN V cortical representation in the parietal lobe is in these areas of the parietal lobe

A

Postcentral gyrus

Brodman’s areas 3,1,2

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15
Q

The sensory afferent portion of CN V serves these regions

A

Face, head
Oral cavity, teeth
Meninges of the base of the skull

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16
Q

Where are the cell bodies of the sensory afferent part of CN V located?

A

Trigeminal ganglion

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17
Q

Where does the trigeminal gangion synapse?

A

Main principal trigeminal sensory nucleus

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18
Q

What is the function of the main principal trigeminal sensory nucleus?

A

Discrimative touch and vibration

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19
Q

CN V main sensory nucleus has these functions

A

Discrimative tactile and jaw proprioception

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20
Q

The crossed ascending pathway of CN V joins this on its way to the ventro posteromedial nucleus

A

Medial lemniscus

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21
Q

This acending pathway of CN V main sensory nucleus does not cross, and is responsible for intraoral sensation/taste.

A

Dorsal trigeminal tract

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22
Q

Where the functional component of CNV that is responsible for pain, crude touch and temperature terminates

A

Trigeminal spinal nucleus

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23
Q

The afferents of the spinal trigeminal tract synapse here

A

Caudal nucleus

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24
Q

Second order neurons o the spinal trigeminal tract send axons across the midline and join this tract.

A

Spinothalamic tract

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25
Q

Where does the spinal trigeminal tract terminate

A

Ventro Posteromedial nucleus

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26
Q

Area of the spinal trigeminal tract that is responsible for pain and temperature

A

Pars caudalis

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27
Q

Two areas of the spinal trigeminal tract responsible for autonomic connections

A

Pars oralis

Pars interpolaris

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28
Q

The pars caudalis receives afferents from these cranial nerves

A

VII, IX, X

29
Q

This area of the pars caudalis contains excitatory and inhibatory interneurons and receives raphe spinal tract fibers

A

Substantia gelatinosa

30
Q

Ascending projections from the trigeminal spinal nucleus are these type of projections to the VPM

A

Contralateral

31
Q

The bilateral projections to the VPM come from here

A

Main trigeminal sensory nucleus

32
Q

Brief eposides of excruciating pain in distribution of one or more division of the trigeminal nerve

A

Trigeminal neuralgia

33
Q

Trigeminal neuralgia is most common in this division

A

Mandibular

34
Q

Branches of this artery are most frequently involved in cases of trigeminal neuralgia

A

Superior cerebellar artery

35
Q

The mesencephalic nucleus projects to this area in jaw jerk reactions

A

Trigeminal notor nucleus

36
Q

The mesencephalic nucleus terminates here in chewing movements

A

Supratrigeminal nucleus

37
Q

The trigeminal mesencephalic nucleus senses these things

A

Spindles in MOM

Mechanoreceptors in gingiva, teeth and hard palate

38
Q

The Mesencepahlic tract and nucleus is located in this level of the brainstem

A

Midpons

39
Q

The cell bodies of the branchial motor nucleus is located here

A

Trigeminal motor nucleus

40
Q

Where does the branchial motor nucleus terminate?

A

MOM

41
Q

The supratrigeminal nucleus is aqctually part of this

A

Reticular formation

42
Q

This is the pattern generator for masticatory rhythm

A

Supratrigeminal nucleus

43
Q

If there is a lesion in the Branchial motor nucleus, what happens?

A

Jaw closure is weakened

Opening of jaw will deviate toward the side of the lesion

44
Q

What does the trigeminal motor nucleus innervate?

A

Muscles of mastication

Tensor muscles

45
Q

The afferent limb of the jaw jerk relex is innervated by this

A

Mesencephalic trigeminal neuron

46
Q

The efferent limb of the jaw jerk reaction is innervated by this

A

Trigeminal motor nucleus

47
Q

This is considered a seperate part o CN VII, and it comes off between CN VII and CNVIII.

A

Nervus intermedius

48
Q

What is the function of nervus intermedius?

A

Carries taste information

49
Q

The motor action of CN VII

A

Muscles of facial expression

Stapedius muscle

50
Q

Sensory action of CNVII

A

Skin of outer ear

Palatine tonsil and posterior nasal cavity

51
Q

CN VII is responsile for taste in these part o the tongue

A

Anterior 2/3

52
Q

Somatic sensory action of CN VII comes from this area

A

Skin of outer ear

53
Q

Where does the somatic sensory axon of CN VII go to in the brainstem?

A

Spinal trigeminal nucleus of the pons

54
Q

What ganglion is used or both visceral and somatic sensory of CN VII?

A

Geniculate ganglion

55
Q

The visceral sensory axon goes to this area of the pons

A

Solitary tract nucleus

56
Q

Visceral sensory action of CN VII

A

Taste buds of anterior 2/3 of tongue

57
Q

What ganglion is used by the visceral motor tract of CN VII

A

Submandibular and Pterygopalatine ganglia

58
Q

The visceral sensory axon of CN VII goes to this in the pons

A

Superior salivatroy nucleus

59
Q

What is the origin of the visceral motor tract

A

Salivary, nasal, palatine and lacrimal glands

60
Q

The branchial motor tract of CN VII goes to this area of the pons

A

Facial motor nucleus

61
Q

Wheredoes the branchial motor tract of CN VII originate?

A

Muscles of facial expression and stapedius

62
Q

Motor neurons to the lower facial muscles are mainly innervated this way

A

Contralaterally

63
Q

Type of unilateral facial paralysis due to CN VII dysfunction

A

Bell’s palsy

64
Q

This is a clinical test of CN V, VII and central connections. It is part of brain death protocol

A

Corneal blink reflex

65
Q

Flavor is due to this

A

Direct stimulation of taste buds

66
Q

This is the chemoreceptive part of the brain

A

Nucleus of the solitary tract

67
Q

Second order fibers of the taste pathways do these two things

A

Relex activities

Project uncrossed to VPM then to gustatory cortex

68
Q

The nucleus of this tract is the principal sensory nucleus of the brainstem

A

Sloitary tract

Anatomy 2 Exam 1 (5 decks)

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