Posterior Spinal Arteries of a Transparent Male

Description

Rendered as a transparent adult male head and upper cervical region, the posterior spinal arteries are traced as paired longitudinal vessels descending along the dorsolateral surface of the spinal cord, just medial to the posterior (dorsal) nerve root entry zones. Proximally, their origin from the vertebral arteries is suggested at the craniovertebral junction, with continuity along the posterior aspect of the cord within the vertebral canal. Surrounding landmarks likely include the medulla oblongata transitioning to cervical spinal cord, adjacent posterior spinal veins, and the cervical vertebrae seen in semi-transparent alignment posterior to the brainstem. Clean midline anatomy. Clear laterality. Posterior spinal artery morphology matters because the cord’s dorsal columns and dorsal horns tolerate ischemia poorly when segmental reinforcement is limited, and the posterior circulation can be compromised by vertebral artery dissection, atherosclerotic stenosis, or iatrogenic injury during cervical instrumentation. This posterior course also clarifies why posterior spinal cord infarction presents with loss of vibration and proprioception rather than the pain and temperature pattern typical of anterior spinal artery syndrome. For endovascular and neurosurgical planning, the vertebral artery to posterior spinal artery relationship at C1 to C2 is a recurring point of confusion, and this view settles it quickly. Use this illustration in gross anatomy and neuroanatomy teaching when introducing spinal cord vascular territories, posterior root entry zone orientation, and vertebral artery branches at the foramen magnum. It also suits stroke education materials, spine surgery atlases, and radiology correlation for CTA or MRA discussions of vertebral artery pathology and dorsal cord infarct patterns. Anatomical accuracy verified by SciePro's Medical Advisory Board.