The trigeminothalamic tracts carry sensation from the face to the thalamus. The ventral tract crosses and carries pain, temperature and touch; a smaller dorsal tract carries touch from the same side.
| Location | From the trigeminal sensory nuclei through the brainstem to the ventral posteromedial nucleus of the thalamus |
|---|---|
| Parts |
|
| Connections |
|
| Blood Supply | Basilar artery and vertebral artery branches; Posterior cerebral artery |
Brings facial pain, temperature and touch to conscious perception.
In lateral medullary syndrome, pain and temperature are lost on the same side of the face (spinal nucleus) and the opposite side of the body; brainstem lesions higher up affect the face on the opposite side because the tract has crossed.
Loss of facial pain and temperature sense whose side depends on the level of the lesion.
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