The ventricles are: the two lateral, third and fourth ventricle. Meninges are: Dura mater, pia mater and arachnoid materĪ system of interconnected spaces within the brain through which the cerebrospinal fluid criculates. The three membranes that envelop and protect the surfaces of the brain and spinal cord. Key facts about the meninges, ventricles and brain blood supply Meninges That’s why we’ve decided to cover them all in one place for you, introducing you to their anatomy and function. Meninges, ventricles and vasculature of the brain can often bring confusion to students. Together these comprise the maintenance system of the brain. By this, we mean the meninges, ventricles, cerebrospinal fluid (CSF) and blood supply. But did you know that the structures surrounding the brain and spinal cord are equally important. This test is not done if an exam or test reveals signs of a brain mass.ĭamage to the nerves in the spinal cord may occur, particularly if the person moves during the test.Ĭisternal puncture or ventricular puncture carries additional risks of brain or spinal cord damage and bleeding within the brain.We know that we couldn’t live without our central nervous system (CNS). This can result in brain damage or death. There is an increased risk of bleeding in people who take blood thinners.īrain herniation may occur if this test is done on a person with a mass in the brain (such as a tumor or abscess). Infection introduced by the needle going through the skin.Hypersensitivity (allergic) reaction to the anesthetic.You should talk to your physician if this occurs. If headaches last more than a few days (especially when you sit, stand or walk) you might have a CSF-leak. Headache after the test that can last a few hours or days.Bleeding into the spinal canal or around the brain (subdural hematomas).A hole is drilled in the skull, and a needle is inserted directly into one of the brain's ventricles.ĬSF may also be collected from a tube that's already placed in the fluid, such as a shunt or a ventricular drain. It is most often done in the operating room. Ventricular puncture may be recommended in people with possible brain herniation.It can be dangerous because it is so close to the brain stem. Cisternal puncture uses a needle placed below the occipital bone (back of the skull).Rarely, other methods of CSF collection may be used. Lumbar puncture with fluid collection may also be part of other procedures such as an x-ray or CT scan after dye has been inserted into the CSF. Occasionally, special x-rays are used to help guide the needle into position. You may be asked to remain lying down for a short time after the test. The needle is removed, the area is cleaned, and a bandage is placed over the needle site.Once the needle is in position, the CSF pressure is measured and a sample of 1 to 10 mL of CSF is collected.
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