What is the name of the tough, fibrous outer meningeal layer?

The tough, fibrous outer meningeal layer is known as the dura mater. This layer is essential for providing a protective barrier for the brain and spinal cord by acting as a shield against physical impacts and infections. The dura mater is the most durable of the three meningeal layers, situated outside the arachnoid and pia mater, which are the more delicate inner layers. Its structure is composed of dense connective tissue, making it resilient and capable of withstanding external forces. This protective quality is vital for the overall safety and functionality of the central nervous system.