Spinal meninges

Spinal Meninges

The Spinal Meninges are a system of three protective membranes that surround the spinal cord. These membranes, from the outermost layer to the innermost, are the dura mater, the arachnoid mater, and the pia mater.

Structure

The dura mater is the outermost layer of the spinal meninges. It is a thick and durable membrane that provides a protective barrier for the spinal cord and the central nervous system.

The arachnoid mater is the middle layer of the spinal meninges. It is a thin, web-like membrane that serves as a cushion for the spinal cord, providing a buffer against physical shock and injury.

The pia mater is the innermost layer of the spinal meninges. It is a delicate, vascularized membrane that closely adheres to the surface of the spinal cord, providing it with nutrients and oxygen.

Function

The primary function of the spinal meninges is to protect the spinal cord and the central nervous system. They also serve to contain and circulate the cerebrospinal fluid, which provides additional protection and nourishment for the spinal cord.

Clinical significance

Damage or infection of the spinal meninges can lead to serious conditions such as meningitis and subarachnoid hemorrhage. Symptoms of these conditions can include severe headache, fever, and neck stiffness, and they require immediate medical attention.

See also

• Meninges
• Spinal cord
• Central nervous system
• Meningitis
• Subarachnoid hemorrhage