EC 23
Dural
Dural refers to the dura mater, which is the outermost of the three layers of the meninges that surround the brain and spinal cord. The dura mater is a thick, durable membrane that provides a protective covering for the central nervous system. It is one of the key components in maintaining the integrity and function of the brain and spinal cord.
Structure[edit | edit source]
The dura mater is composed of two layers:
- Periosteal layer: This is the outer layer that is attached to the inner surface of the skull. It serves as the periosteum for the cranial bones.
- Meningeal layer: This is the inner layer that lies closer to the brain. It is continuous with the dura mater of the spinal cord.
The two layers are fused together in most places, but they separate to form structures such as the dural venous sinuses, which are channels that drain venous blood from the brain.
Function[edit | edit source]
The dura mater serves several important functions:
- Protection: It provides a tough protective layer that shields the brain and spinal cord from injury.
- Support: The dura mater helps to support the brain within the skull and keeps it in place.
- Venous drainage: The dural venous sinuses are crucial for draining deoxygenated blood from the brain and returning it to the heart.
Clinical Significance[edit | edit source]
Dural Tears[edit | edit source]
Dural tears can occur as a result of trauma, surgery, or spontaneously. They can lead to cerebrospinal fluid (CSF) leaks, which may cause headaches and increase the risk of infection.
Meningiomas[edit | edit source]
Meningiomas are tumors that arise from the meninges, often from the dura mater. They are typically benign but can cause symptoms by compressing adjacent brain tissue.
Subdural Hematoma[edit | edit source]
A subdural hematoma is a collection of blood between the dura mater and the arachnoid mater. It is usually caused by head injury and can lead to increased intracranial pressure.
Also see[edit | edit source]
Resources[edit source]
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Source: Data courtesy of the U.S. National Library of Medicine. Since the data might have changed, please query MeSH on EC 23 for any updates.
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