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)
References
edit- ^ Patestas, Maria A.; Gartner, Leslie P. (2016). A Textbook of Neuroanatomy (2nd ed.). Hoboken, New Jersey: Wiley-Blackwell. p. 329. ISBN 978-1-118-67746-9.
- ^ Siegel, Allan; Sapru, Hreday N.; Siegel, Heidi (2015). Essential Neuroscience (3rd ed.). Philadelphia: Wolters Kluwer Health. p. 229. ISBN 978-1-4511-8968-1.
External links
edit- Trigeminothalamic tracts (Netter image)
- http://www.medilexicon.com/medicaldictionary.php?t=48738 Archived 2013-06-03 at the Wayback Machine
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