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PNS #1 > 1: UIII CN V General > Flashcards

1: UIII CN V General Flashcards

1
Q

What CN is the largest?

A

Trigeminal nerve

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2
Q

How is the trigeminal nerve classified?

A

Mixed nerve; more SENSORY fibers than motor

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3
Q

What is the nickname of the trigeminal nerve?

A

Great sensory nerve of the face

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4
Q

What three nuclei of termination are associated with the trigeminal nerve?

A

Main sensory nucleus
Spinal nucleus
Trigeminal mesencephalic nucleus

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5
Q

What is the one nucleus of origin associated with the trigeminal nerve?

A

Trigeminal motor nucleus (in PNS)

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6
Q

What is the one peripheral ganglion associated with the trigeminal nerve?

A

Trigeminal (semilunar) ganglion

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7
Q

What are the three peripheral branches of CN V?

A

Opthalamic
Maxillary
Mandibular

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8
Q

Where do the three peripheral branches branch out from?

A

Trigeminal ganglion

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9
Q

Where are the cell bodies of the main and spinal nuclei found?

A

In the trigeminal ganglion

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10
Q

Where do the peripheral processes (dendrites) come from (CN V)?

A

Face to trigeminal ganglion

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11
Q

How do the central processes of CN V travel?

A

From the trigeminal ganglion enter CNS to the main trigeminal nucleus or spinal nucleus

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12
Q

What information does the main trigeminal nucleus handle?

A

Touch, vibration, joint proprioception

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13
Q

What information does the spinal nucleus handle?

A

Pain and temperature

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14
Q

What cord pathway does CN V use?

A

Pain & Temp: lateral spinothalamic tract
Synapse: VPL of thalamus
1st order sensory

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15
Q

How do dendrites from CN V to the mesencephalic nucleus?

A

Dendrites from the periphery pass THROUGH the trigeminal ganglion, enter CNS, ascend to mesencephalic nucleus

NO SYNAPSES

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16
Q

What are the only primary sensory neurons that have cell bodies in the CNS?

A

Dendrites traveling to the mesencephalic nucleus

17
Q

How do CN V axons from the motor nucleus travel?

A

Axons leave the motor nucleus, leave CNS, travel through trigeminal ganglion to be carried in the mandibular branch

18
Q

What muscles does the maximally division of CN V innervate?

A

Muscles of mastication and chewing

19
Q

What is the only branch of CN V to carry motor fibers?

A

Mandibular branch

20
Q

Where does the motor nucleus receive information from?

A

Cerebral cortex, reticular formation, red nucleus, tectum, medial longitudinal fasciculus, mesencephalic nucleus

21
Q

What does the mesencephalic nucleus recieve?

A

Proprioceptive info from the muscles of mastication

22
Q

What is the apparent origin of the trigeminal nerve?

A

Lateral aspect of the pons

23
Q

How does the trigeminal nerve travel?

A

Anterior ward over the petrous part of the temporal bone, enters a pouch of dura (trigeminal (Meckel’s) cave

24
Q

Where is the trigeminal ganglion found?

A

In the trigeminal cave (Meckel’s)

25
Q

What is the name of CN V?

A

Trigeminal nerve

PNS #1 (14 decks)

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