Upper Sacral Cord (S1)
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Gray Matter
Anterior Horn: Motor Nuclei
Posterior Horn:
Posteromarginal Nucleus
Nucleus Proprius
Substantia Gelatinosa
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 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
Central canal

S-1 Cord Level Features:
Upper sacral cord resembles lower lumbar segments with thickened gray horns in lumbosacral enlargement.
No Clarke's column, fasciculus gracilis only.