Arachnoid, Arachnoid Mater

The arachnoid membrane (Arachnoid, Arachnoid Mater) is the middle of the three membranes covering the brain and spinal cord (see Meninges); very thin, has an almost web-like structure. Between it and the choroid is the subarachnoid space containing cerebrospinal fluid. It contains a large number of blood vessels; the membrane itself is not supplied with blood.

The arachnoid membrane, or arachnoid (Latin arachnoidea), also known as arachnoid mater (Latin mater arachnoidealis), is the middle of three membranes covering the brain and spinal cord. It is one of the thinnest shells, but at the same time it has an almost arachnoid structure.

Between the arachnoid membrane and the choroid of the brain is the subarachnoid space - a cavity filled with cerebrospinal fluid (CSF). The subarachnoid cavity has a large number of blood vessels, but the arachnoid membrane itself is not supplied with blood.

The arachnoid membrane performs several important functions in the human body. First, it protects the brain from external influences such as injury or infection. In addition, the arachnoid membrane is involved in the exchange of substances between the brain and cerebrospinal fluid, ensuring the delivery of nutrients and the removal of metabolic products.

In addition, the arachnoid membrane plays an important role in regulating intracranial pressure and maintaining normal brain function. Any changes in this membrane can lead to various diseases, such as meningitis or hydrocephalus, so it is important to monitor its condition and promptly treat if necessary.

Arachnoid shell

The arachnoid membrane is a substance present in the human body. They are three membranes that cover the spinal cord and head of the brain. Despite the fact that this shell is the third in a row, it is the thinnest of the shells. In addition, between it and the other substance there is a subacroid. Each membrane of the brain has its own functions. Some perform the function of protecting the brain, others contain arteries and veins to nourish it. Still others are needed to conduct impulses to organs. If there is a pathology in the development or structure of the brain, it is this membrane that is affected first. Pathological processes include tumors, cracks, various

The arachnoid or arachnoid mater is the middle of the three membranes lining the brain and vertebral cord of the spinal cord. Very delicate, fragile, more nylon than gossamer, extremely sensitive to mechanical stress. Performs a supporting function for the choroid of the spinal cord and brain, and also actively participates in reparative processes, healing of damaged surfaces, having high regenerative ability and fibroblastic properties.

The arachnoid membrane allows only small blood cells and lymphocytes responsible for immunity to pass through. There are neoplasms that form from the cells of the arachnoid membrane - arachnoidosis membranosus. Due to its ability to direct the cerebrospinal fluid accumulating inside the cavity into the subarachnadal cisterns, it provides protection against overextension of the spinal canal during intense wakefulness of the head and torso.

In addition to its protective function, the shell of the Web