Pia Mater, Posterior View

Description

Posteriorly, the pia mater is seen investing the cerebral hemispheres and dipping into the sulci between the gyri, then continuing inferiorly over the cerebellar folia and along the dorsal surface of the brainstem. Caudally, the pial covering extends onto the spinal cord, narrowing toward the conus medullaris and giving rise to the filum terminale that descends in the midline within the lumbar cistern. The paired hemispheres appear separated at the longitudinal fissure, with the cerebellum positioned inferior and posterior to the occipital lobes. Fine surface relief dominates. That posterior emphasis is practical when teaching where pia adheres tightly to neural tissue compared with arachnoid mater, and how that relationship shapes the subarachnoid space used for lumbar puncture below the conus. The filum terminale often gets mentioned only in passing, yet it matters in tethered cord syndrome and during laminectomy or intradural exploration when a thickened filum can be sectioned to relieve traction. Orientation to the conus medullaris matters. A few millimeters are the difference between safe CSF access and cord injury. Neuroanatomy and neurophysiology courses use this view to anchor meningeal layers on real brain topography, and to connect the cranial pia to its spinal continuation without switching illustrations. It also fits well in neurosurgery, anesthesiology, and radiology teaching files when introducing subarachnoid hemorrhage spread over sulci, or correlating conus level variation with procedural planning. Anatomical accuracy verified by SciePro's Medical Advisory Board.