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Neuroscience > Trigeminal Nerve > Flashcards

Trigeminal Nerve Flashcards

1
Q

Where does the spinal nucleus of CN V located?

A
  • Lower Pons
  • Medulla
  • Upper spinal cord
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2
Q

Where are the primary sensory and motor nuclei of CN V located?

A
  • Middle pons
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3
Q

Where is the mesencephalic nucleus located?

A
  • Upper pons and midbrain
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4
Q

What are the 3 portions of the trigeminal nerve?

A

V1: Opthalamic
V2: Maxillary
V3: Mandibular

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5
Q

What functional components does CN V have?

A

SVE

GVA

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6
Q

What is the GVA component of the trigeminal nerve?

A
  • Sensory to face
  • Oral cavity
  • Dura mater of anterior and middle cranial fossa
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7
Q

What is the SVE of CN V?

A
  • Muscles of mastication
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8
Q

What sensory information is processed in the mesencephalic nucleus of CN V?

A
  • Proprioception
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9
Q

What information is processed by the chief nucleus of CN V?

A
  • Somatosensory information to the face and head
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10
Q

What information is processed at the spinal nucleus of CN V?

A
  • Pain and temperature of the face and head
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11
Q

What division of CN V is the only one containing motor fibers?

A

V3: Mandibular

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12
Q

What reflex travels through the motor nucleus of CN V?

A
  • Jaw jerk
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13
Q

What types of fibers synapse on the mesencephalic nucleus?

A

Ia
Ib
II

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14
Q

What reflex travels through the mesencephalic nucleus?

A

Stretch reflex

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15
Q

What are the 3 parts of the spinal nucleus?

A
  • Caudalis
  • Interpolaris
  • Oralis
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16
Q

Which part of the spinal nucleus is concerned with pain and temperature to the face?

A
  • Caudalis
17
Q

How is the caudalis portion of the spinal nucleus arranged somatotopically?

A
  • V1 ventrolateral

- V3 dorsomedial

18
Q

What does the interpolaris provide sensation to?

A

The teeth

19
Q

What does the oralis provide sensation to?

A

Touch from mouth, lip, nose

20
Q

What pain and temperature sensation does CN VII supply through CN V?

A
  • External ear
  • External auditory meatus
  • Outer surface of ear drum
21
Q

What pain and temperature sensation does CN IX supply through CN V?

A
  • Ear
  • Posterior 1/3 of tongue
  • Auditory tube
  • Upper pharynx
22
Q

What pain and temperature sensation does CN X supply through CN V?

A
  • Ear
  • Lower pharynx
  • Upper esophagus
23
Q

What is trigeminal neuroalgia?

A
  • Episodic paroxysmal pain of CN V distribution

- Mild stimuli cause pain ipsi-laterally to lesion

24
Q

Describe the path of the ventral trigeminal thalamic tract.

A
  • GVA from the face descend down to the spinal nucleus

- Projectional tract cells cross over and ascend up to thalamus

25
Q

How do fibers from the muscles of mastication regular jaw jerk reflex?

A
  • Collateral from proprioceptive fibers synapse on the motor nucleus

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