What are the three protective membranes surrounding the brain and spinal cord called?

The three protective membranes surrounding the brain and spinal cord, known as the meninges, are the dura mater, arachnoid mater, and pia mater. The dura mater is the outermost layer and is a tough, durable membrane that provides a protective barrier for the brain and spinal cord. The arachnoid mater is the middle layer, which has a web-like appearance and acts as a cushioning layer. Beneath it lies the pia mater, the innermost layer that closely adheres to the surface of the brain and spinal cord, providing essential support and protection.

Understanding these membranes is crucial because they play a significant role in protecting the central nervous system from trauma and infections, as well as containing cerebrospinal fluid, which nourishes and cushions the brain and spinal cord. This knowledge is foundational for professionals in neurology and related fields, as it directly relates to how the brain and spinal cord are protected in both health and disease contexts.