Rexed laminae

The Rexed laminae comprise a system of ten layers of grey matter (I-X), identified in the early 1950s by Bror Rexed to label portions of the spinal cord.

Similar to Brodmann areas, they are defined by their cellular structure rather than by their location, but the location still remains reasonably consistent.

Laminae

 * I-VI: Posterior/dorsal horn
 * Lamina I: posteromarginal nucleus
 * Laminae II/III: substantia gelatinosa
 * Laminae III/IV/V: nucleus proprius
 * Lamina VI: nucleus dorsalis
 * VII-IX: Anterior/ventral horn
 * Lamina VII: intermediolateral nucleus
 * Lamina VIII: motor interneurons
 * Lamina IX: motor neurons which also contain the nucleus of onuf in the sacral region
 * Lamina X: neurons bordering Central canal