Posterior intermediate sulcus and septum
Anterior median fissure
Posterior spinal arteries
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.