Rexed laminae
Encyclopedia
Grey matter
Grey matter is a major component of the central nervous system, consisting of neuronal cell bodies, neuropil , glial cells and capillaries. Grey matter contains neural cell bodies, in contrast to white matter, which does not and mostly contains myelinated axon tracts...
(I-X), identified in the early 1950s by Bror Rexed
Bror Rexed
Bror Rexed was a Swedish neuroscientist and professor at Uppsala University. Internationally, he is best known today for his development of the system now known as Rexed laminae, but in Sweden, he is also known for his involvement in the "du-reformen" of the Swedish language.In 1980, he was the...
to label portions of the spinal cord
Spinal cord
The spinal cord is a long, thin, tubular bundle of nervous tissue and support cells that extends from the brain . The brain and spinal cord together make up the central nervous system...
.
Similar to Brodmann area
Brodmann area
A Brodmann area is a region of the cerebral cortex defined based on its cytoarchitectonics, or structure and organization of cells.-History:...
s, they are defined by their cellular structure rather than by their location, but the location still remains reasonably consistent.
Laminae
- Posterior/dorsal horn: I-VI
- Lamina I: marginal nucleus of spinal cord or posteromarginal nucleus
- Lamina II: substantia gelatinosa of RolandoSubstantia gelatinosa of RolandoThe apex of the posterior horn of the gray matter of the spinal cord is capped by a V-shaped or crescentic mass of translucent, gelatinous neuroglia, termed the substantia gelatinosa of Rolando , which contains both neuroglia cells, and small nerve cells...
- Laminae III/IV: nucleus propriusNucleus propriusThe Nucleus proprius is a layer of the spinal cord adjacent to the substantia gelatinosa. Nucleus proprius constitutes the bulk of the dorsal horn and receives inputs from the dorsal root ganglions that carry sensory information, such as light touch, as well as pain and temperature information...
- Lamina V: Neck of the dorsal horn
- Lamina VI: Base of the dorsal horn,
- Intermediate zone: VII and X
- Lamina VII: intermediomedial nucleus, intermediolateral nucleusIntermediolateral nucleusThe intermediolateral nucleus is a region of gray matter found in Rexed lamina VII of the spinal column.Rexed Lamina VII contains several well defined nuclei including the nucleus dorsalis , the intermediolateral cell column , and the sacral autonomic nucleus.It extends from the first thoracic...
, nucleus dorsalis in the thoracic and upper lumbar region - Lamina X: central gray matter i.e. neurons bordering Central canalCentral canalFor the engineering project, see Indiana Central Canal.The central canal is the cerebrospinal fluid-filled space that runs longitudinally through the length of the entire spinal cord. The central canal is contiguous with the ventricular system of the brain...
- Lamina VII: intermediomedial nucleus, intermediolateral nucleus
- Anterior/ventral horn: VIII-IX
- Lamina VIII: motor interneurons
- Lamina IX: lateral (in limb regions) and medial motor neurons, also phrenicPhrenic nerveThe phrenic nerve originates mainly from the 4th cervical nerve, but also receives contributions from the 5th and 3rd cervical nerves in humans....
and spinal accessoryAccessory nerveIn anatomy, the accessory nerve is a nerve that controls specific muscles of the shoulder and neck. As part of it was formerly believed to originate in the brain, it is considered a cranial nerve...
nuclei at cervical levels, and Onuf's nucleusOnuf's nucleusOnuf’s nucleus is a distinct group of neurons located in the ventral part of the anterior horn of the sacral region of the human spinal cord involved in the maintenance of micturition and defecatory continence, as well as muscular contraction during orgasm. It contains motor neurons, and is the...
in the sacral region