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3 Pain and pain management > Trigeminal system > Flashcards

Trigeminal system Flashcards

1
Q

what is the central nervous system composed of?

A

brain
spinal chord

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2
Q

what is the peripheral nervous system composed of?

A

spinal nerves
cranial nerves

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3
Q

what is an afferent nerve?

A

conducted towards the CNS

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4
Q

what is an efferent nerve?

A

conducted away from the CNS

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5
Q

where is the cell body usually located in afferent nerves?

A

outside the CNS

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6
Q

steps in the trigeminal sensory pathway from a tooth

A

tooth
primary afferent neurone
trigeminal ganglion
exit PNS enter CNS
trigeminal sensory nuclei
2nd order neurone -> trigemino-thalamic tract
thalamus
somatosensory cortex

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7
Q

what is the trigemino-thalamic tract?

A

group of nerves running as a bundle in the CNS

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8
Q

name this structure

A

trigeminal ganglion

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9
Q

name this division of CNV

A

ophthalmic

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10
Q

name this division of CNV

A

maxillary

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11
Q

name this division of CNV

A

mandibular

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12
Q

name this division of CNV

A

ophthalmic

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13
Q

name this division of CNV

A

maxillary

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14
Q

name this division of CNV

A

mandibular

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15
Q

what are the 3 divisions of the peripheral trigeminal nerve?

A

ophthalmic
maxillary
mandibular

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16
Q

name this part of the brain

A

pons

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17
Q

name this part of the brain

A

medulla

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18
Q

name this part of the brain

A

brainstem

19
Q

name this part of the brain

A

cerebellum

20
Q

First synapse for trigeminal nerve is where?

A

in the brainstem

21
Q

why is the IVth ventricle used as a landmark within the brainstem

A

bottom of it marks where nucleus caudalis starts

22
Q

the trigeminal sensory nuclear complex is divided into what 4 sections?

A

trigeminal main sensory nucleus
nucleus oralis
nucleus interpolaris
nucleus caudalis

23
Q

name this nuclei area

A

trigeminal main sensory nucleus

24
Q

name this nuclei area

A

trigeminal nucleus oralis

25
Q

name this nuclei area

A

trigeminal nucleus interpolaris

26
Q

name this nuclei area

A

trigeminal nucleus caudalis

27
Q

nerves from the trigeminal system can enter the sensory nuclear complex. different inputs synapse at different what?

A

parts of the brainstem

28
Q

what is the likely function of the trigeminal main sensory nuceli?

A

synapses for touch

29
Q

what is the likely function of trigeminal nucleus caudalis

A

synapses for facial pain and hot/cold
(oral/dental pain)

30
Q

what is the likely function of trigeminal nucleus oralis?

A

synapses for oral/dental pain

31
Q

what is the likely function of trigeminal nucleus interpolaris

A

not known but assume reflexes

32
Q

what is a trigeminal tractoctomy?

A

surgical operation that cuts spinal tract stopping nerves going into caudalis. Results in loss of facial pain and hot and cold

33
Q

what is a trigeminal tractoctomy used to treat?

A

trigeminal neuralgia

34
Q

in the peripheral trigeminal nerve motor root what do the efferent nerves do?

A

send signals to muscles of mastication

35
Q

in the peripheral trigeminal nerve motor root what do the afferent nerves do?

A

from muscle spindles which tell where our limbs are e.g. contracted

from PDLMs -> PDL mechanoreceptors which tells use how much pressure is put on our teeth

36
Q

in the motor root of the peripheral trigeminal nerve the cell bodies are located where?

A

trigeminal mesencephalic nucleus

37
Q

the trigeminal mesencephalic nucleus contains cell bodies for what afferents?

A

jaw muscle spindle afferents

mechanoreceptor afferents from PDL

38
Q

how is the trigeminal mesencephalic nucleus unique?

A

primary afferent cell bodies within the central nervous system

39
Q

are there synapses in the trigeminal mesencephalic nucleus?

A

no they synapse elsewhere in the trigeminal motor nucleus

40
Q

name this structure

A

trigeminal mesencephalic nucleus

41
Q

name this structure

A

trigeminal motor nucleus

42
Q

the trigeminal motor nucleus is medial to what?

A

the main sensory nucleus

43
Q

the trigeminal motor nucleus gets inputs from where?

A

trigeminal mesencephalic nucleus
motor cortex

44
Q

the trigeminal motor nucleus sends efferents where

A

exit via motor root to mandibular division to supply the muscles of mastication

3 Pain and pain management (12 decks)

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