S3: Trigeminal System Flashcards Preview

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Flashcards in S3: Trigeminal System Deck (20)
1

Most somatosensory information from the head and neck enters the CNS via___ axons 

 CN 5 

2

Axons of the trigeminal nerve conveying epicritic sensation synapse immediately in the _____

 principal sensory nucleus of CN 5 and in the pontine part of the spinal n. of 5 

3

after synapsing in the  principal sensory nucleus of CN 5 and in the pontine part of the spinal n. of 5, axons carryign epicrtic infor travel to the

medial lemniscus on the other side

4

from the medial lemniscus, epiticrtic from head and neck synapses in the

vpM

5

from the VPM, epicritic from head and neck synapses in the

post central gyrus

6

damage to epicritc sesnation on same side would have to be lesion of

1. CN 5, trigeminal ganglion 

2. principal sensory nucleus of 5 or the spinal nucleus of 5

7

damage to epicritc sesnation on opposite side would have to be lesion of

1. medial lemniscus 

2. VPM of the thlamaus

3. post central gyrus

8

proprioceptive info from upper body and lower body is brought up to the cerebellum on the same or opposite side?

same side. spinocerebellar crosses and then recrosses

9

damage to epicritc sesnation on same side would have to be lesion of

1. CN 5, trigeminal ganglion

2. principal sensory nucleus of 5 or the spinal nucleus of 5 in the pons 

10

 conveying protopathic from the head and neck descend toward the spinal cord as the 

spinal tract of CN 5,

11

carrying protopathic from head and face, the spinal tract synapses in the

spinal nucleus in the medulla

12

from the spinal nucleus in the medulla proppathic info -->

crosses the midline and synapses mostly in the reticular formation

13

after syanpsing in the reticualr formation, axons carrying propathic from head and face travel to the

VPM and other parts of the thalamus like the intralaminar nuceli

14

ipsilateral loss of propathic of head and neck is X of 

1. spinal tract of CN 5

2. spinal n. of 5 in the medulla

15

contralateral loss of propathic from head and neck

caused by X of 

1. after the spinal nulceus in the medulla (where it crosses) so a pons or midbrain region

2. in the vpm 

16

proprioceptive input from the face

 

Axons in the trigeminal nerve are continuous with the neurons of the____ 

 mesencephalic nucleus of CN 5

17

from the  mesencephalic nucleus of CN 5, propicopetive from the face continues as the emscenepahic tract of CN 5

 

and synapses on the CN nucleus of 5 for ____

jaw reflexes

18

from the  mesencephalic nucleus of CN 5, propicopetive from the face continues as the emscenepahic tract of CN 5

and synapses via the reticular formation before projecting to the

cerebellum

19

mtoor component of trigeminal nerve

Axons arise from cells in the motor nucleus of CN 5 in the 

pons

20

Axons arise from cells in the motor nucleus of CN 5 in the pons and innervate the muscles of mastication on the ____ side. 

same