Anatomical Section of the Spinal Cord and Its Arteries

Description

Centered in the sectioned spinal cord, the butterfly-shaped gray matter forms anterior (ventral) horns and posterior (dorsal) horns, encircled by peripheral white matter columns (funiculi). Along the ventral midline, the anterior median fissure marks the course of the anterior spinal artery, with penetrating sulcal branches entering toward the central gray matter. Smaller arterioles radiate through the white matter to reach the dorsal horn and intermediate zone, aligning their trajectories with the cord’s medial to lateral organization and the deeper metabolic demands of the gray matter. Nerve rootlets are implied at the periphery, positioned anterolaterally for ventral roots and posterolaterally for dorsal roots in standard anatomical orientation. Clinically, this arrangement frames why anterior spinal artery compromise produces a characteristic anterior cord syndrome, with ischemia of the anterior two-thirds of the cord affecting corticospinal tracts and spinothalamic pathways while often sparing dorsal column modalities. Sulcal artery territories are small and end-arterial in behavior, so embolic or hypoperfusion events can yield sharply demarcated infarcts centered in the ventral gray matter. A clear cross-sectional map of the anterior median fissure artery also supports teaching around vascular vulnerability during thoracoabdominal aortic aneurysm repair, radiculomedullary artery sacrifice, and postoperative spinal cord ischemia. Use this image in neuroanatomy and neurovascular teaching blocks to correlate white matter columns with arterial territories, and in clinical neuroscience texts discussing spinal cord infarction patterns on MRI (especially diffusion restriction in the anterior horns). It also suits surgical and anesthesia education when explaining perfusion risks during aortic cross-clamping and spinal drainage protocols. Anatomical accuracy verified by SciePro's Medical Advisory Board.