Spinal nucleus of the trigeminal nerve
Citation, DOI, disclosures and article data
At the time the article was created Chris Rothe had no recorded disclosures.View Chris Rothe's current disclosures
At the time the article was last revised Frank Gaillard had the following disclosures:
- Biogen Australia Pty Ltd, Investigator-Initiated Research Grant for CAD software in multiple sclerosis: finished Oct 2021 (past)
These were assessed during peer review and were determined to not be relevant to the changes that were made.View Frank Gaillard's current disclosures
The spinal nucleus of the trigeminal nerve is one of three major nuclei that make up the trigeminal sensory nerve nuclear complex along with the main sensory nucleus and the mesencephalic nucleus 1-2.
The spinal nucleus of the trigeminal nerve is a paired structure and is an inferior continuation of the main sensory nucleus of the trigeminal nerve. It extends from the caudal lower pons inferiorly through the medulla to the level of the upper cervical cord (approximately C2 to C3 levels) where it becomes continuous with the dorsal horn of the spinal cord. The spinal nucleus lies ventral to the vestibular and cochlear nuclei and medial to the inferior cerebellar peduncles.
The spinal nucleus of the trigeminal nerve has three parts with somatotopic mapping of the face upside down; the upper part mapping to the lower face whereas the lowest most caudal part maps the forehead 3,4:
pars oralis: from pons to mid-medulla, joining the main sensory nucleus of the trigeminal nerve
pars interpolaris: mid-medulla
pars caudalis: from the lower medulla to upper cervical cord, directly continuous with the dorsal horn of the spinal cord
The spinal nucleus receives afferent impulses from the ipsilateral face which convey information about pain, temperature and crude touch. The nucleus also receives sensory afferent impulses from other cranial nerves: