Cervical Enlargement (C1)
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Gray Matter
Anterior horn (& ventral roots):
Spinal accessory nucleus of CN XI & exiting fibers
Motor nuclei
Posterior horn:
Spinal nucleus & tract of CN V
Tracts:
Anterior Funiculus

Motor
Anterior corticospinal
Medial vestibulospinal (in the MLF)
Lateral vestibulospinal
Medial reticulospinal
 		Sensory
Anterior spinothalamic
Anterior white commissure

Lateral funiculus
Motor
Lateral corticospinal
Lateral reticulospinal
 		Sensory:
Lateral spinothalamic
Posterior spinocerebellar
Anterior spinocerebellar

Posterior funiculus
Fasciculus gracilis
Fasciculus cuneatus

 Other:
Posterior intermediate sulcus and septum
Anterior median fissure
Posterior spinal arteries
Central Canal

C-1 Cord Level Features:
Large, roundish cross sectional diameter.
Gray matter has enlarged posterior horn as substantia gelatinosa becomes spinal nucleus V and anterior horn has promient protrusion for nucleus of CN XI.
Lateral funiculus is mottled by fasciculated fibers of the lateral corticospinal tract.