Test 2: Trigeminal Flashcards Preview

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Flashcards in Test 2: Trigeminal Deck (31):
1

Where are the CB?

Trigeminal ganglion: all except proprio
Tigeminal mesencephalic nucleus (ONLY one in CNS): proprioception only

2

What are the 3 tracts and what modalities?

Trigeminal leminiscal: touch
Trigeminal thalamic: pain and temp
Dorsal trigeminothalamic: dental pressure

3

Where are the 2CB for the trigeminal leminiscal?

Main nucleus- pons

4

Where does the trigeminal leminiscal dessucate?

2nd neuron in pons

5

What tract do the 2neurons travel in trigeminal leminiscal?

trigeminal leminiscal

6

Where do 2neurons synpase on 3rd in trigem leminiscal?

VPM nucleus in thalamus

7

Where do the VPM neurons in trigem leminisc synapse in cortex?

Primary somatic sensory cortex (touch and proprioception)

8

Where do 1neurons travel in Trigeminothalamic tract?

Down spinal trigeminal tract! like lissaures

9

Where do 1neurons synpase with 2nd/2CB of trigeminothalamic tract?

Spinal trigeminal nucleus- medulla
oral, interpolar, or caudal nuclei

10

Where do trigeminothalamic 2neurons decussate?

in that level of medulla

11

What tract do 2neurons travel up to cortex in trigeminothalam?

Trigeminothalamic tract

12

Where do 2neurons synapse on 3rd in trigeminothalamic?

VPM and VMp and medial dorsal nucleus

13

Where do 3neurons go in trigeminothalamic?

cinulate gyrus (from med. dors nuc): emotion
SI: from VPM
Insula/S2 (from VPM): affective aspect pain

14

What is the function of trigeminal (CNV)?

Carry somatosensory info for:
face, scalp, eyes, sinuses, teeth, eardrum, oral cavity, ant 2/3rd tongue

Control muscle of mastication
Sensory functions for discriminitive touch of face/dental pressure
Jaw proprioception
Face pain/temp
Innvervates dura mater

15

What are the 3 parts of CNV?

V1: Opthalamic
-forehead to top of nose
-enters superior orbital fissure

V2: Maxillary
-nose to lips
-enters Rotundum Foramen

V3: Mandibular
-ear laterally to chin
-enters Ovale Foramen

16

What are the 3 nucleus groups from midbrain-medulla

Trigem mesenceph nuc: proprioception

Trigem main nuc: touch, dental pressures, mechanoreceptors

SpinalTrigem Nuc: oral, interpolar, and caudal

17

What is in the trigeminal mesencephalic nucleus?

1CB for proprioception afferent fibers
ONLY CNS ganglia

18

What is in trigeminal main nucleus?

2CB for discriminitive touch/dental pressure
mechanoreceptors

19

Where does the spinal trigeminal nucleus occupy?

ponse to caudal medulla/rostral C-spine

20

What are the 3 parts of the spinal trigeminal nucleus

1. Oral: 2CB orofacial fine touch

2. Interpolar: 2CB for orofacial pain, temp, and itch

3. Caudal: 2CB head and face pain, temp, and itch
-extension of dorsal horn functionally

21

What is in trigeminal ganglia?

ALL 1 CB EXCEPT PROPRIOCEPTION
(proprio in trigem mesesnceph nuc)

22

What are the BA areas for S1 and S2?

BA 1, 2, and 3

23

Where is 1CB for dorsal trigem tract?

trigeminal ganglia
-dental pressure

24

Where does dorsal trigem tract 1neuron synpase on 2CB

main nucleus
(ponse)

25

What tract does 2neurons travel in dorsal trigeminal

dorsal trigeminal tract

26

Where does 2neurons synapse in dorsal trigeminal tract
Where does 3nerons synapse

IPSILATERAL VPM
S1/S2

27

What pathways does oral pressure/proprioception go?

trigeminal mesencephalic tract

28

Where is the 1CB of the trigeminal mesencaphalic tract?

trigeminal mesencephalic nucleus
-goes from muscle spindle NO CB in ganglia-> nucleus

29

Where does 1neuron synapse on 2CB trigeminal mesencephalic tract

trigeminal motor nucleus
AND
main nucleus-> decussates to contralat VPM

30

What is the viscerosensory pathway

originates from pressure receptors in pharynx, larynx, esophogause, and chest viscera
-axons in CNIX and X

31

What is the path for the viscerosensory pathways

CN IX/X-> solitary tract -> CAUDAL solitary nuclues (medulla)
2CB solitary nucleus -> VPM-> insula
OR 2CB -> parabrachial nucleus (pons)-> hypothal/amygdala