Section of the Skull Containing the Dura Mater

Description

Cut through a lateral section of the calvaria, the cranial cavity is opened to reveal the dura mater draped against the inner table of the skull and reflected around the cerebral mass. The periosteal (endosteal) layer lies immediately deep to bone, while the meningeal layer is positioned internal to it, forming a firm fibrous envelope superficial to the arachnoid mater and pia mater that invest the brain. Medial to the cranial vault, the cerebrum fills the supratentorial space with prominent gyri and sulci, while the cerebellum sits posterior and inferior in the posterior cranial fossa, continuous with the brainstem at the level of the foramen magnum region. Separating the two dural layers is not a pedantic detail, it is the basis for understanding epidural versus subdural hemorrhage patterns and why they behave differently on CT. Dural attachment to the inner skull and its reflections create fixed borders that shape mass effect, midline shift, and compartmental herniation, teaching points that come up immediately in acute trauma, anticoagulation-related bleeding, and postoperative neurosurgical patients. A clear lateral section also helps orient learners to why pain from meningeal irritation (for example in meningitis) localizes via trigeminal and upper cervical afferents rather than from the brain parenchyma itself. Membranes matter. Use this illustration in neuroanatomy and head and neck courses when introducing the meninges, dural layers, and intracranial compartments, or in radiology and emergency medicine teaching to pair anatomy with classic epidural and subdural collections. It also fits neurosurgical and neuropathology publications that need an anatomically grounded depiction of dura mater in relation to the skull and posterior fossa structures. Anatomical accuracy verified by SciePro's Medical Advisory Board.