What are the protective membranes surrounding the brain and spinal cord known as?

The protective membranes that encase the brain and spinal cord are known as the meninges. These layers serve multiple critical functions, including acting as a barrier to infections, providing structural support, and containing cerebrospinal fluid, which cushions the brain and spinal cord.

The meninges consist of three distinct layers: the dura mater, which is the tough outer layer; the arachnoid mater, which has a web-like appearance and sits between the dura and the pia mater; and the pia mater, which is a thin layer that closely adheres to the surface of the brain and spinal cord. The combination of these layers helps to protect the central nervous system from physical impacts and infections.

Understanding the role and structure of the meninges is crucial for comprehending various neurological conditions and injuries that may affect the brain and spinal cord.