Trigeminal system

Question 1

what makes up the CNS?

Answer 1

Brain and spinal cord

Question 2

what makes up the PNS?

Answer 2

spinal cord and cranial nerves

Question 3

what is a ganglion?

Answer 3

a collection of nerve bodies

Question 4

in the general sensory pathway, where does the primary afferent neurone 1st synapse?

Answer 4

brainstem OR spinal cord

Question 5

in the general sensory pathway, after the 1st synapse what travels to the 2nd synapse?

Answer 5

2nd order neurone

Question 6

in the general sensory pathway, where is the 2nd synapse?

Answer 6

thalamus

Question 7

in the general sensory pathway, where where does the neurone go after the 2nd synapse in the thalamus?

Answer 7

somatosensory cortex

Question 8

in the trigeminal sensory pathway, where does the primary afferent neurone synapse?

Answer 8

trigeminal sensory nuclei

Question 9

in the trigeminal sensory pathway, what does the 2nd neurone travel along?

Answer 9

trigemino-thalamic tract

Question 10

in the trigeminal sensory pathway, where does the trigemino-thalamic tract take the 2nd order neurone?

Answer 10

thalamus

Question 11

what is the difference between the general sensory pathway and the trigeminal sensory pathway?

Answer 11

the first synapse location
general - brainstem/ spinal cord
trigeminal - trigeminal ganglion

Question 12

how many divisions does the trigeminal nerve have?

Answer 12

3

Question 13

how many roots does the trigeminal nerve have?

Answer 13

2

Question 14

where in the brain does the trigeminal nerve enter through?

Answer 14

pons

Question 15

what is a nuclei?

Answer 15

contains 2nd order cell bodies that synapse with primary order and is main recipient of afferent inputs

Question 16

what are the sensory nuclei of the trigeminal nerve?

Answer 16

main sensory
oralis
interpolaris
caudalis

Question 17

at what trigeminal nuclei do synapses occur?

Answer 17

oralis
caudalis

Question 18

what is the caudalis nuclei responsible for?

Answer 18

site for pain, hot and cold

Question 19

what is the oralis nucleus responsible for?

Answer 19

oral and dental pain
reflexes

Question 20

what is the interpolaris nucleus responsible for?

Answer 20

reflexes

Question 21

what types of nerve bypass the trigeminal ganglion and enter through the trigeminal motor root?

Answer 21

muscles of mastication efferent nerves
afferent nerves from all spindles and some PDLMs

Question 22

what does the trigeminal mesencephalic nucleus function?

Answer 22

proprioception of the periodontium and muscles of mastication

Question 23

what would happen if the main sensory nucleus was damaged?

Answer 23

ipsilateral loss of touch to face
still feel pain, hot or cold

Question 23

what would happen if the main sensory nucleus was damaged?

Answer 23

ipsilateral loss of touch to face
still feel pain, hot or cold

Question 24

what are the nucleus involved with motor root?

Answer 24

motor nucleus
mesencephalic nucleus

Question 25

where is the motor nucleus in relation to the MSN?

Answer 25

medial

Question 26

what would happen if there was damage to the nucleus caudalis?

Answer 26

loss of ipsilateral facial pain, hot and cold
still feel touch