Spinal_trigeminal_nucleus

Spinal trigeminal nucleus

Spinal trigeminal nucleus

Medullal nucleus receiving skin information from the ipsilateral face

The spinal trigeminal nucleus is a nucleus in the medulla that receives information about deep/crude touch, pain, and temperature from the ipsilateral face. In addition to the trigeminal nerve (CN V), the facial (CN VII), glossopharyngeal (CN IX), and vagus nerves (CN X) also convey pain information from their areas to the spinal trigeminal nucleus.[1] Thus the spinal trigeminal nucleus receives afferents from cranial nerves V, VII, IX, and X.

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Anatomy

Structure

The spinal nucleus is composed of three subnuclei: subnucleus oralis (pars oralis), subnucleus caudalis (pars caudalis), and subnucleus interpolaris (pars interpolaris). The subnucleus oralis is associated with the transmission of discriminative (fine) tactile sense from the orofacial region, and is continuous with the principal sensory nucleus of V. The subnucleus interpolaris is also associated with the transmission of tactile sense, as well as dental pain, whereas the subnucleus caudalis is associated with the transmission of nociception and thermal sensations from the head.

This region is also denoted at sp5 in other neuroanatomical nomenclature.[2]

Efferents

This nucleus projects to the ventral posteriomedial (VPM) nucleus in the contralateral thalamus via the ventral trigeminal tract.[3]

Relations

The nucleus is situated lateral to the nucleus of tractus solitarius.[4]

See also

References

  1. [1]
    Brainstem Nuclei Archived 2007-04-13 at the Wayback Machine
  2. [2]
    George Paxinos (2004). The Mouse Brain in Stereotaxic Coordinates. Gulf Professional Publishing. ISBN 978-0-12-547640-9. Retrieved 16 August 2013.
  3. [3]
    Mercer JG, Moar KM, Findlay PA, Hoggard N, Adam CL (September 1998). "Association of leptin receptor (OB-Rb), NPY and GLP-1 gene expression in the ovine and murine brainstem". Regul. Pept. 75–76: 271–278. doi:10.1016/s0167-0115(98)00078-0. PMID 9802419. S2CID 34348758.
  4. [4]
    Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). p. 476. ISBN 978-0-7295-3752-0.


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