What is the dura mater of the spinal cord?

The dura mater of the spinal cord serves as the outermost and toughest layer of the meninges that encase and protect the spinal cord and the brain. Its primary function is to provide a durable protective barrier against trauma, as well as to assist in structural support. The dura mater is fibrous and provides an anchor for various structures, making it essential for maintaining the integrity of the central nervous system.

This layer is distinct from the innermost layer, known as the pia mater, which is directly attached to the surface of the spinal cord and brain, and from the arachnoid mater, which lies between the dura mater and pia mater. The mention of cerebrospinal fluid pertains to the subarachnoid space, which is located between the arachnoid mater and pia mater and not within the dura itself. Similarly, while connective tissue is present throughout the meninges, the term specifically identifying the dura mater indicates its unique role as the outermost layer that offers strong protection.