The arachnoid mater (or simply arachnoid) is one of the three meninges, the protective membranes that cover the brain and spinal cord. It is so named because of its resemblance to a spider web. The arachnoid mater is a derivative of the neural crest mesoectoderm in the embryo.

2021年6月2日 · There are three layers of meninges, known as the dura mater, arachnoid mater and pia mater. These coverings have two major functions: Provide a supportive framework for the cerebral and cranial vasculature. Acting with cerebrospinal fluid to protect the CNS from mechanical damage.

2021年10月9日 · An arachnoid cyst is a noncancerous fluid-filled sac that grows on the brain or spinal cord. Symptoms include headaches and seizures, but many arachnoid cysts don’t cause symptoms. Treatment isn’t always necessary. Providers drain or remove cysts that cause symptoms. Untreated, arachnoid cysts can cause brain damage and movement problems.

Arachnoiditis is a rare pain disorder caused by inflammation of the arachnoid, one of the membranes that surrounds the nerves of your spinal cord. It can cause severe pain and neurological symptoms, such as muscle weakness. Arachnoiditis has several possible causes, and treatment is aimed at managing symptoms.

2024年2月15日 · The arachnoid mater is named for its spiderweb-like appearance and is a thin transparent membrane encasing the brain and spinal cord like a loosely fitting sac. It is separated from the pia mater , the innermost layer of the meninges, by the subarachnoid space containing the CSF and the brain's blood vessels , including the cerebral arterial ...

2022年1月11日 · Your arachnoid mater, the middle layer of your meninges, lies directly below your dura mater. It’s a thin layer that lays between your dura mater and pia mater. It doesn’t contain blood vessels or nerves. It has a spiderweb-like appearance (“arachnoid” means spider) because it has connective tissue projections that attach to your pia mater.

2024年9月30日 · Enveloping the brain like a gossamer shield, the arachnoid layer plays a critical role in protecting our most complex organ from harm. This delicate membrane, nestled between the dura mater and pia mater, forms an integral part of the meninges of the brain, a trio of protective layers that safeguard our cognitive command center.

2023年10月30日 · Arachnoid granulations are pockets of arachnoid membrane and subarachnoid space which connect cerebrospinal fluid to venous circulation. They extend from the subarachnoid space through the dura mater to enter the walls of dural venous sinuses and allow for the passage of cerebrospinal fluid.

2023年7月5日 · Arachnoiditis is a condition characterized by inflammation of the arachnoid membrane, which is one of the three protective layers (meninges) that surround and encase the brain and spinal cord. The arachnoid membrane lies between the outermost dura mater and the innermost pia mater.

Arachnoiditis is a progressive disorder that involves the brain and/or the spinal cord caused by inflammation of the arachnoid membrane.