spinal cord, cross-section, 3d showing anatomy of the human spinal cord

spinal cord atrophy muscular cerebrospinal lumbar brain sensory axon nervous system neurological white matter neurohistology histology grey histological medical section body nerve science organ anatomy central human medicine structure illustration biology neurology 3d anatomical education scientific palsy paralysis normal healthy sma isolated black background paraplegia tetraplegia polio transverse myelitis