Rexed laminae

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Medulla spinalis - Substantia grisea

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Rexed lamina

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. ^[1]^[2]

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

References

↑ Rexed B (1952). "The cytoarchitectonic organization of the spinal cord in the cat.". J Comp Neurol 96 (3): 414-95. PMID 14946260.
↑ Rexed B (1954). "A cytoarchitectonic atlas of the spinal cord in the cat.". J Comp Neurol 100 (2): 297-379. PMID 13163236.

External links

v • d • e

Anatomy of torso (primarily): the spinal cord

Spinal nerve

Dorsal (Root, Ganglion, Ramus) • Ventral (Root, Ramus) • Sympathetic trunk • rami communicantes (Gray, White)

Gray matter/Rexed laminae

Posterior horn (Posteromarginal nucleus, Column of Clarke, Substantia gelatinosa of Rolando, Nucleus proprius)

Lateral horn/Anterior horn (Intermediolateral nucleus)

Central canal/Substantia gelatinosa centralis - Gray commissure

White matter

somatic/ascending (blue)	Posterior/PCML: touch: Gracilis • Cuneatus Lateral: proprioception: Spinocerebellar (Dorsal, Ventral) • pain/temp: Spinothalamic (Lateral, Anterior) • Posterolateral (Lissauer) • Spinotectal
motor/descending (red)	Lateral: Corticospinal (Lateral) • Ep (Rubrospinal, Olivospinal) Anterior: Corticospinal (Anterior) • Ep (Vestibulospinal, Reticulospinal, Tectospinal)