The meninges is the system of membranes which envelops the central nervous system. The meninges consist of three layers: the dura mater, the arachnoid mater, and the pia mater.
The dura mater dura, is the outermost of the three layers of the meninges surrounding the brain and spinal cord. The other two meningeal layers are the pia mater and the arachnoid mater.
The dura surrounds the brain and the spinal cord and is responsible for keeping in the cerebrospinal fluid.
Many medical conditions involve the dura mater.
A subdural hematoma occurs when there is an abnormal collection of blood between the dura and the arachnoid, usually as a result of torn bridging veins secondary to head trauma.
An epidural hematoma is a collection of blood between the dura and the inner surface of the skull, and is usually due to arterial bleeding.
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