Posterior horn

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Posterior horn
Section of medulla spinalis. The posterior horn is the upper protrusion of grey matter, labeled with "2"
Latin	cornu posterius medullae spinalis
Gray's	subject #185 753
Dorlands/Elsevier	c_55/12259855

The posterior horn (posterior column, posterior cornu, dorsal horn, spinal dorsal horn) of the spinal cord is the dorsal (more towards the back) grey matter of the spinal cord. It receives several types of sensory information from the body, including light touch, proprioception, and vibration. This information is sent from receptors of the skin, bones, and joints through sensory neurons whose cell bodies lie in the dorsal root ganglion.

Anatomy

The posterior grey horn is subdivided into these laminae. Below are several named examples of each lamina.

• Marginal lamina (Lamina I)
• Substantia gelatinosa (Lamina II)
• Nucleus proprius (Laminae III,IV,V)
• Column of Clarke (Lamina VII)

The other laminae are located in other regions of grey matter in the spinal cord.

Additional images

Section of the medulla oblongata through the lower part of the decussation of the pyramids

See also

• Posterior column-medial lemniscus pathway
• Posterior horn of lateral ventricles
• Anterior horn

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)
Layers	Epidural space • Dura mater • Subdural space • Arachnoid mater • Subarachnoid space • Pia mater
Other structures	Denticulate ligaments • Conus medullaris • Cauda equina • Filum terminale • Cervical enlargement • Lumbar enlargement Anterior median fissure • Posterior median sulcus Anterior white commissure