Spinal Cord Inside the Vertebra with Surrounding Cerebrospinal Fluid, Sectional View

Description

Centered within the vertebral canal, the spinal cord appears in transverse section with its H shaped gray matter surrounded by peripheral white matter, all enclosed by the meninges. Posterior (dorsal) horns taper toward the dorsal median sulcus, while anterior (ventral) horns broaden toward the ventral median fissure, and the central canal sits at the gray commissure. A sleeve of cerebrospinal fluid occupies the subarachnoid space between arachnoid mater and pia mater, separating the cord from the dura mater lining the inner surface of the vertebra. Spinal nerve rootlets are implied at the lateral cord margin, where dorsal (sensory) and ventral (motor) components converge toward the intervertebral foramina. CSF anatomy matters most when you need to explain why a lumbar puncture samples subarachnoid fluid rather than the central canal, and why intrathecal drug delivery distributes along the dorsal and ventral surfaces of the cord. The relationship between pia, arachnoid, and dura also anchors teaching on spinal anesthesia and post dural puncture headache, which reflects altered CSF dynamics after a dural tear. Gray versus white matter organization is not just textbook, it maps directly to clinical syndromes such as anterior cord syndrome (infarction of the anterior spinal artery affecting ventral horns and corticospinal tracts) or syringomyelia, where a cavitation expanding from the central canal can interrupt crossing spinothalamic fibers. Use this asset in neuroanatomy and neuroscience curricula to orient learners to dorsal versus ventral horns, central canal position, and meningeal spaces, and in anesthesia, neurology, or radiology publications that discuss subarachnoid hemorrhage, meningitis, or intrathecal catheter placement in the spinal column. Clean geometry and clear CSF boundaries also support patient education handouts on spinal tap mechanics and CSF circulation. Anatomical accuracy verified by SciePro's Medical Advisory Board.