Spinal Cord Inside the Vertebra Surrounded by Cerebrospinal Fluid, Gross Anatomy

Description

Centered within the vertebral canal, a transverse (axial) section of the adult spinal cord is presented with its central gray matter forming the classic H or butterfly configuration, surrounded by peripheral white matter organized into anterior, lateral, and posterior funiculi. Anterior (ventral) and posterior (dorsal) nerve rootlets project laterally from the cord toward the intervertebral foramina, bracketing the dorsolateral and ventrolateral sulci. A circumferential ring of cerebrospinal fluid (CSF, liquor) separates the cord from the enclosing meninges within the bony vertebra, emphasizing the subarachnoid space and the cord’s suspended position within the central column. Spatial orientation is clear. This cross-sectional anatomy matters because most compressive myelopathies and many procedural complications are best understood in axial relationships: CSF outlines the cord on MRI myelography, while extradural masses first efface the thecal sac before deforming the cord itself. Gray matter vulnerability in anterior spinal artery infarction, with preferential injury to anterior horn cells and adjacent corticospinal tracts, becomes easier to teach when the anterior median fissure and surrounding white matter are read as a map rather than a pattern. The lateral exit of nerve roots also frames radiculopathy mechanisms when disc herniation or foraminal stenosis affects roots outside the cord, versus intramedullary lesions that respect cord boundaries. Use this asset in neuroanatomy and gross anatomy lab manuals to anchor lectures on spinal cord organization, meninges, and CSF circulation, and in radiology teaching files when correlating axial T2-weighted imaging with normal subarachnoid CSF signal and pathologic thecal sac effacement. It also suits neurosurgical and anesthesia education when explaining why lumbar puncture targets the CSF space while avoiding cord levels, and how meningeal layers define epidural versus intrathecal approaches. Anatomical accuracy verified by SciePro's Medical Advisory Board.