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The dorsal trigeminal tract (also dorsal trigeminothalamic tract, or posterior trigeminothalamic tract) are uncrossed second-order sensory fibers conveying fine (discriminative) touch and pressure information from the dorsomedial division of principal sensory nucleus of trigeminal nerve to the ipsilateral ventral posteromedial nucleus of thalamus. Second-order fibers from the ventrolateral division of the principal sensory nucleus meanwhile cross-over to ascend contralaterally in the ventral trigeminal tract along with those fibers arising from the spinal trigeminal nucleus.[1]
| Dorsal trigeminal tract | |
|---|---|
| Details | |
| Identifiers | |
| Latin | tractus trigeminothalamicus posterior |
| NeuroNames | 606 |
| NeuroLex ID | birnlex_1718 |
| TA98 | A14.1.05.312 |
| TA2 | 5864 |
| FMA | 72500 |
| Anatomical terms of neuroanatomy | |
The DTT may be likened functionally to the medial lemniscus.[2]
Trigeminal ganglion → first-order neurons → dorsomedial division of principal sensory nucleus of trigeminal nerve (in pons) (synapse) → second-order neurons → trigeminal lemniscus (in midbrain) → (ipsilateral) ventral posteromedial nucleus of the thalamus (synapse) → third-order neurons → sensory cortex of postcentral gyrus (synapse)
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