spinal trigeminal nucleus

(redirected from Spinal nucleus)

spi·nal nu·cle·us of tri·gem·i·nal nerve

[TA]
the long sensory nucleus extending from the caudal border of the pontine sensory nucleus of the trigeminus down through the lateral region of the rhombencephalon into the upper three segments of the spinal cord's dorsal horn; it receives the fibers of the sensory root of the trigeminal nerve that descend along its lateral border as the spinal tract of trigeminal nerve [TA]. Small numbers of fibers to the nucleus originate on cranial nerves VII, IX, and X. This nucleus is divided into a pars caudalis [TA] (caudal part [TA]), a pars interpolaris [TA] (interpolar part [TA]), and a subnucleus oralis [TA] (oral subnucleus [TA]). The pars caudalis is further organized into a subnucleus zonalis [TA] (zonal subnucleus [TA]), a subnucleus gelatinosus [TA] (gelatinosus subnucleus [TA]), and a subnucleus magnocellularis [TA] (magnocellular subnucleus [TA]).

spinal trigeminal nucleus

A nucleus of the general somatic sensory column that extends through the entire hindbrain as a continuation of the dorsal horn nuclei of the spinal cord; rostrally the spinal trigeminal nucleus merges into the principal sensory trigeminal nucleus. The spinal trigeminal nucleus receives axons, from the trigeminal nerve (CN V) and other cranial nerves, carrying pain and temperature signals from the face and mouth. This nucleus sends axons to the ventral posterior nucleus of the thalamus via the medial lemniscus and the spinothalamic tract.
Synonym: trigeminal spinal nucleus
See also: nucleus
References in periodicals archive ?
The greatest concentrations of kappa-receptors in nociceptive regions are in lamina I and II of the spinal cord dorsal horn as well as in the spinal nucleus of the trigeminal nerve (substantia gelatinosa).
The spinal nucleus of CN V mediates facial pain and temperature, and is the largest nucleus extending from the dorsal aspect of the pons into the upper cervical cord.
Based in Houston, Texas, SpinalCyte is a tissue engineering technology company developing a solution for spinal nucleus replacement using human dermal fibroblasts.
Trieu and Inventor, "Composite spinal nucleus implant with water absorption and swelling capabilities," US Patent 7857856, 2010.
The spinal nucleus of the bulbocavernosus (SNB) is a male-specific, sexually dimorphic nucleus in the lumbosacral spinal cord (L5--S1 level) that innervates perineal striated muscles attached to the base of the penis.
Therefore, this study we investigated the neuroanatomical functional site of the EL extracts (root) in rat spinal nucleus by means of c-Fos immunohistochemistry.
Rowlands explained that, "This event showcased some of the cutting edge research being undertaken into novel biomaterials within the Custom IMD project." Comprised of 23 partners from seven European countries, the Custom IMD consortium is focusing its efforts on three case studies: craniofacial bone plates, spinal nucleus prostheses and dental restorations.
It is also interesting that synapsis afferents reaching the solitary nucleus happens again to the PA5 connecting reciprocally ipsi- and contra-laterally with solitary, parabrachial, dorsal vagus, caudal medullar dorsal horn, C1 and C2 ventral medullar horns (the accessory's spinal nucleus portion) and SC5 nuclei (Jou et al., 2002).
If a reviewer has never seen a particular technology before--he mentioned spinal nucleus replacement devices as an example of VC-backed technology just coming into FDA's view--it should not mean that the clinical trial endpoints take years to work out, he said.
Of the trigeminal's three main branches, the mandibular branch is the largest, with 78,000 myelinated axons compared to 26,000 and 50,000 of the other branches.[11] The sensory component is dominant and connects with the trigeminal spinal nucleus of the medulla.
Based in Houston, Texas, SpinalCyte, LLC is a tissue engineering technology company developing an innovative solution for spinal nucleus replacement using human dermal fibroblasts.