Posterior grey column
The posterior grey column (posterior cornu, dorsal horn, spinal dorsal horn, posterior horn, sensory horn[1]) of the spinal cord is one of the three grey columns of the spinal cord. It is a pronounced, dorsolaterally-oriented ridge of gray matter in either lateral half of the spinal cord. When viewed in transverse section, it is termed the posterior horn or dorsal horn.[2]
| Posterior grey column (Posterior horn of spinal cord) | |
|---|---|
 Cross section of the spinal cord. The posterior horn is the upper protrusion of grey matter, labeled with "2" | |
| Details | |
| Identifiers | |
| Latin | cornu posterius medullae spinalis |
| MeSH | D066148 |
| TA98 | A14.1.02.115 A14.1.02.023 A14.1.02.114 |
| TA2 | 6064 |
| FMA | 256530 |
| Anatomical terminology | |
The posterior column contains the cell bodies of second-order sensory neurons and their synapses with the pseudounipolar first-order sensory neurons (whose cell bodies are located within the sensory ganglia (a.k.a. dorsal root ganglia)). It receives several types of sensory information from parts of the body (including fine touch, proprioception, and vibration) from receptors of in the skin, bones, and joints.
Anatomy
The posterior horn extends to the surface of the spinal cord.[3]
Structure
The posterior grey column is subdivided into six layers termed Rexed laminae I-VI
- Marginal nucleus of spinal cord (lamina I)
- Substantia gelatinosa of Rolando (lamina II)
- Nucleus proprius (laminae III, IV)
- Spinal lamina V, the neck of the posterior horn[4]
- Spinal lamina VI, the base of the posterior horn.
The other four Rexed laminae are located in the other two grey columns in the spinal cord.
Additional images
Section of the medulla oblongata through the lower part of the decussation of the pyramids
See also
References
- "Dorsal horn | anatomy". Encyclopedia Britannica. Retrieved 2021-05-04.
- "columna posterior". TheFreeDictionary.com. Retrieved 2023-06-13.
- Sinnatamby, Chummy S. (2011). Last's Anatomy (12th ed.). p. 487. ISBN 978-0-7295-3752-0.
- Woolsey, Robert M.; Vernon W. Lin; Cardenas, Diana D.; Cutter, Nancy C.; Frederick S. Frost; Margaret C. Hammond; Laurie B. Lindblom; Inder Perkash; Robert Waters (2002). Spinal Cord Medicine: Principles and Practice. Demos Medical Publishing. ISBN 1-888799-61-7.