Medical Terminology
Spinal Cord
Brain

What is the medical term meaning membranes surrounding the brain?

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2013-02-15 03:00:14

The

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meninges (from the Greek meninx, meaning "membrane")

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cover and protect the brain and spinal cord. The meninges have

three layers: 1) the dura mater, 2) the arachnoid, and 3) the pia

mater. The dura mater is the outermost layer covering the central

nervous system. The arachnoid (from the Greek arachne, meaning

"spider") is a web-like network of collagen and elastic fibers. The

innermost layer of the meninges is the pia mater. The pia mater is

firmly attached to the neural tissue of the spinal cord and brain.

Cerebrospinal fluid fills the space between the pia matter and the

arachnoid membrane. Most of the blood vessels that supply blood to

the central nervous system are in the pia mater.

The outermost layer of the brain membrane (meninges) is the dura

mater, "tough mother". The middle layer of meninges is the

arachnoid (spider) mater which helps stabilize the brain inside the

skull. Finally the pia mater overlies the brain directly.


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