CN V Trigeminal Pathways

Question 1

CN V Trigeminal - Somatosensory Pathways - Light Touch - 1st Order neuron soma in?

Answer 1

Trigeminal ganglion outside mid pons

Question 2

CN V Trigeminal - Somatosensory Pathways - Light Touch - 2nd Order neuron somas located in?

Answer 2

Main sensory nucleus in lateral mid pons

Question 3

CN V Trigeminal - Somatosensory Pathways - Light Touch - 3rd Order neuron cell bodies located in the?

Answer 3

Ventral posteromedial nucleus of the thalamus

Question 4

CN V Trigeminal - Somatosensory Pathways - Light Touch - Axons of 2nd order neurons cross midline and ascend to the thalamus via the?

Answer 4

Ventral trigeminothalamic tract (exception of touch inside the mouth)

Question 5

CN V Trigeminal - Somatosensory Pathways - Light Touch - Axons for touch inside the mouth remain uncrossed and ascend in the dorsal trigeminothalamic tract - T/F

Answer 5

T

Question 6

CN V Trigeminal - Somatosensory Pathways - Light Touch - 3rd order neurons project to the face region of the?

Answer 6

Primary somatosensory cortex on the postcentral cortex of the parietal lobe

Question 7

CN V Trigeminal - Somatosensory Pathways - Proprioception - 1st order neuron somas for all proprioception in?

Answer 7

Mesencephalic nucleus at levels of caudal and rostral medial midbrain.

Question 8

CN V Trigeminal - Somatosensory Pathways - Proprioception - 2nd order neuron somas located in?

Answer 8

Main sensory nucleus in min pons

Question 9

CN V Trigeminal - Somatosensory Pathways - Conscious Proprioception - 3rd order neuron somas located in the?

Answer 9

Ventral posteromedial nucleus of the thalamus

Question 10

CN V Trigeminal - Somatosensory Pathways - Conscious Proprioception - Axons of 2nd order neurons cross midline and ascend to the thalamus via the?

Answer 10

Ventral Trigeminothalamic tract

Question 11

CN V Trigeminal - Somatosensory Pathways - Conscious Proprioception - 3rd order neurons project to the face region of the?

Answer 11

Primary somatosensory cortex on the postcentral gyrus of the parietal lobe

Question 12

What is the Jaw Jerk Reflex - Afferent neuron somas located in?

Answer 12

Mesencephalic nucleus in the medial dorsal mdibrain

Question 13

What is the Jaw Jerk Reflex - Synapses on LMNs in the?

Answer 13

Motor nucleus of CN V in the lateral dorsal mid pons

Question 14

What is the Jaw Jerk Reflex - Axons of LMNs travel in?

Answer 14

CN V3 Mandibular division trigeminal to muscles of mastication

Question 15

CN V Trigeminal - Somatosensory Pathways - Nociception/Temperature - 1st order neuron somas in?

Answer 15

Trigeminal ganglion outside the mid pons

Question 16

CN V Trigeminal - Somatosensory Pathways - Nociception/Temperature - 2nd order neuron somas in?

Answer 16

Spinal Trigeminal nucleus/spinal of CN V in lateral caudal medulla

Question 17

CN V Trigeminal - Somatosensory Pathways - Nociception/Temperature - 3rd order neuron somas located in the?

Answer 17

Ventral Posteromedial nucleus of the thalamus

Question 18

CN V Trigeminal - Somatosensory Pathways - Nociception/Temperature - Central axon of 1st order neuron descends posterolaterally in the?

Answer 18

Spinal Trigeminal tract

Question 19

CN V Trigeminal - Somatosensory Pathways - Nociception/Temperature - The spinal trigeminal tract goes into the?

Answer 19

Caudal medulla/upper cervical spinal cord where it synapses with 2nd order neuron in the spinal trigeminal nucleus

Question 20

CN V Trigeminal - Somatosensory Pathways - Nociception/Temperature - Face - Axon of 2nd order neuron crosses midline and ascends to the ventral posteromedial nucleus of the thalamus via the?

Answer 20

Ventral Trigeminothalamic tract situated medially throughout the medulla and caudal pons

Question 21

CN V Trigeminal - Injury - Ipsilateral paresis/paralysis of muscles of?

Answer 21

Mastication

Question 22

CN V Trigeminal - Injury - Ipsilateral loss of sensation in areas of?

Answer 22

Nerve distribution

Question 23

CN V Trigeminal - Injury - Could also see what reflex impaired?

Answer 23

Jaw Jerk