Trigeminal Pathways-CNV

Question 1

This nucleus is responsible for motor function of the trigeminal nerve

Answer 1

motor nucleus

Question 2

This nucleus is responsible for touch, vibration, and proprioceptive functions of the trigeminal nerve

Answer 2

main sensory nucleus

Question 3

This nucleus is responsible for pain and temperature sensation as well as trigeminalo-mediated relfexes of the trigeminal nerve

Answer 3

spinal trigeminal nucleus

Question 4

This is an example of a trigeminal reflex

Answer 4

blink reflex

Question 5

This portion of the spinal trigeminal nucleus is responsible for trigeminally-mediated reflexes

Answer 5

anterior portion

Question 6

This nucleus is responsible for proprioception of the gums/jaw

Answer 6

mesencephalic

Question 7

What is anatomically unique about the mesencephalic nucleus?

Answer 7

it is located in the CNS (only place where 1˚ afferents are located within the CNS)

Question 8

Where does the central process of the mesencephalic nucleus terminate?

Answer 8

trigeminal motor nucleus

Question 9

Where do the axons of the main sensory nucleus terminate on the thalamus?

Answer 9

ventroposterior medial thalamus (VPM)

Question 10

What type of sensation is carried bilaterally in the trigeminal nerve?

Answer 10

main sensory nucleus information from the oral cavity

Question 11

What nucleus does not produce axons that cross the midline?

Answer 11

mesencephalic

Question 12

How many synapses are involved in the jaw jerk reflex

Answer 12

1 (!)

Question 13

Damage to one side of the trigeminal motor nucleus causes what deficit?

Answer 13

deviation on ipsilateral side

–>motor neurons do not cross midline