S3: Trigeminal System Flashcards
Most somatosensory information from the head and neck enters the CNS via___ axons
CN 5
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
![](https://s3.amazonaws.com/brainscape-prod/system/cm/078/702/977/a_image_thumb.png?1659418282)
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
![](https://s3.amazonaws.com/brainscape-prod/system/cm/078/703/032/a_image_thumb.png?1659418282)
from the medial lemniscus, epiticrtic from head and neck synapses in the
vpM
![](https://s3.amazonaws.com/brainscape-prod/system/cm/078/703/090/a_image_thumb.png?1659418283)
from the VPM, epicritic from head and neck synapses in the
post central gyrus
![](https://s3.amazonaws.com/brainscape-prod/system/cm/078/703/162/a_image_thumb.png?1659418283)
damage to epicritc sesnation on same side would have to be lesion of
- CN 5, trigeminal ganglion
- principal sensory nucleus of 5 or the spinal nucleus of 5
damage to epicritc sesnation on opposite side would have to be lesion of
- medial lemniscus
- VPM of the thlamaus
- post central gyrus
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
damage to epicritc sesnation on same side would have to be lesion of
- CN 5, trigeminal ganglion
- principal sensory nucleus of 5 or the spinal nucleus of 5 in the pons
conveying protopathic from the head and neck descend toward the spinal cord as the
spinal tract of CN 5,
![](https://s3.amazonaws.com/brainscape-prod/system/cm/078/704/922/a_image_thumb.png?1659418283)
carrying protopathic from head and face, the spinal tract synapses in the
spinal nucleus in the medulla
![](https://s3.amazonaws.com/brainscape-prod/system/cm/078/706/234/a_image_thumb.png?1659418284)
from the spinal nucleus in the medulla proppathic info –>
crosses the midline and synapses mostly in the reticular formation
![](https://s3.amazonaws.com/brainscape-prod/system/cm/078/706/246/a_image_thumb.png?1659418284)
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
ipsilateral loss of propathic of head and neck is X of
- spinal tract of CN 5
- spinal n. of 5 in the medulla
contralateral loss of propathic from head and neck
caused by X of
- after the spinal nulceus in the medulla (where it crosses) so a pons or midbrain region
- in the vpm
![](https://s3.amazonaws.com/brainscape-prod/system/cm/078/712/011/a_image_thumb.png?1659418284)