Middle Lumbar Cord (L3)
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Gray Matter
Anterior Horn: Motor Nuclei
Posterior Horn:
Posteromarginal Nucleus
Nucleus Proprius
Substantia Gelatinosa
Clarke's Column (Nucleus Dorsalis)
Tracts:
Anterior Funiculus

Motor
Medial Reticulospinal
Lateral Vestibulospinal
Sensory
Anterior Spinothalamic
Anterior White Commissure
Lateral Funiculus
Motor
Lateral Corticospinal
Lateral Reticulospinal
Sensory:
Lateral Spinothalamic
Posterior Spinocerebellar

Posterior Funiculus
Fasciculus Gracilis
Zone of Lissauer

Other:
Anterior median fissure
Dorsal root entry zone, medial & lateral
Dorsal roots
Ventral roots
Anterior Spinal Artery
Posterior Spinal Artery
Pia
Arachnoid
Dura
Denticulate ligament
Central canal

L-3 Cord Level Features:
Diameter greater than thoracic cord due to expansion of gray horns in lumbosacral enlargement.
Prominent Clarke's column.
Posterior White Column has fasciculus gracilis only.