Dural sheath

Definition

The dural sheath is a protective membrane that surrounds the spinal cord and nerve roots. It is part of the dura mater, the outermost layer of the meninges in the central nervous system.

5 Must Know Facts For Your Next Test

1. The dural sheath provides mechanical protection to the spinal cord against physical impacts.
2. It plays a crucial role in containing cerebrospinal fluid (CSF) within the subarachnoid space.
3. Infections can invade the nervous system by breaching the dural sheath, leading to conditions such as meningitis.
4. The dural sheath extends from the foramen magnum at the base of the skull down to the second sacral vertebra.
5. Inflammation or damage to the dural sheath can result in significant neurological deficits.

Review Questions

• What are the primary functions of the dural sheath in protecting the spinal cord?
• How can infections breach the dural sheath and what are potential consequences?
• Describe how inflammation of the dural sheath might impact neurological function.

Related terms

Meninges: Three layers of protective tissue called dura mater, arachnoid mater, and pia mater that surround the brain and spinal cord.

Cerebrospinal Fluid (CSF): A clear fluid found in the brain and spinal cord that provides cushioning and removes waste products.

Meningitis: An infection-induced inflammation of the protective membranes covering the brain and spinal cord.