How do spinal meninges differ from cranial meninges?

The question asks how spinal meninges differ from cranial meninges. Let's analyze each option: A. Discontinuous Periosteal layer with vertebral periosteum: In the cranium, the outer layer of the dura mater is fused to the periosteum of the skull bones. In the spinal canal, the dura mater is a single layer and is not* fused to the periosteum of the vertebrae. This creates a distinct epidural space. So, the "periosteal layer" as part of the dura is effectively absent or "discontinuous" in the spinal region compared to the cranium. This statement describes a true difference. B. Has not dural partitions: The cranial dura mater forms folds or partitions (like the falx cerebri and tentorium cerebelli) that extend into the brain fissures. The spinal dura mater does not* form such partitions. This is a true difference. C. Posses epidural spaces: In the spinal canal, there is a distinct epidural space between the dura mater and the vertebral canal, filled with fat and a venous plexus. In the cranium, there is no true epidural space because the outer dural layer is fused to the periosteum of the skull. This is a true difference. D. Delicate and vascular pia mater: Both the cranial and spinal pia mater are delicate, highly vascular membranes that closely adhere to the surface of the brain and spinal cord, respectively. This characteristic is common to both and therefore is not* a difference. Since options A, B, and C all describe ways in which spinal meninges differ from cranial meninges, and option D describes a similarity, the most accurate answer is that all options except D are true differences. The final answer is E Last free one today — make it count tomorrow, or type /upgrade for unlimited.