Arachnoid trabeculae

Arachnoid Trabeculae

Error creating thumbnail:

Diagram of arachnoid trabeculae within the subarachnoid space.

The arachnoid trabeculae are delicate, web-like structures that are part of the arachnoid mater, one of the three meninges that cover the central nervous system. These trabeculae extend through the subarachnoid space, connecting the arachnoid mater to the underlying pia mater.

Structure

The arachnoid trabeculae are composed of collagen and elastic fibers, which provide both strength and flexibility. They are sparsely distributed throughout the subarachnoid space, creating a supportive framework that helps maintain the position of the cerebrospinal fluid (CSF) and the blood vessels that traverse this space.

Function

The primary function of the arachnoid trabeculae is to support the brain and spinal cord by maintaining the subarachnoid space. This space is filled with CSF, which acts as a cushion, protecting the central nervous system from mechanical injury. The trabeculae also play a role in the circulation of CSF, allowing it to flow freely around the brain and spinal cord.

Clinical Significance

Disruption or alteration of the arachnoid trabeculae can occur in various pathological conditions. For example, in arachnoiditis, inflammation of the arachnoid mater can lead to scarring and thickening of the trabeculae, which may impede the flow of CSF and cause neurological symptoms. Additionally, trauma or surgery involving the meninges can damage the trabeculae, potentially leading to complications such as cerebrospinal fluid leaks.

Related Pages

• Arachnoid mater
• Pia mater
• Dura mater
• Subarachnoid space
• Cerebrospinal fluid
• Meninges