An incredible discovery has been made in neuroanatomy. A new structure known as the subarachnoidal lymphatic-like membrane was detected. The previously unknown anatomical structure was discovered through neuro-imagining and techniques developed by microbiology. The structures function most likely acts as a protective barrier. The area can be a place in which immune cells monitor the brain from infections and inflammation. The discovery was made through research by the University of Rochester and University of Copenhagen. The new information reveals much about the connection between cerebrospinal fluid and immune system response. The brain has a method of waste disposal and protection. The common understanding was that the meningeal layer had only three layers. Those layers included the dura, arachnoid, and pia layers. The new layer is located between the arachnoid and pia layers. The newly discovered membrane is similar to mesothelium. These membranes are designed to protect organs in the body. The subarachnoidal lymphatic-like membrane is a much thinner membrane, but still very selective about what molecules pass through to get access to cerebrospinal fluid. The discovery can be utilized to have a greater understanding of diseases of the brain. Abnormalities in the membrane could have a role in multiple sclerosis, dementia, and severe central nervous system infections. The clue given was that a larger amount of immune cell gather in the SLYM during inflammation. This also happens during aging. The brain does change with age. Knowing more about the brain can ensure the best methods of maintaining cognitive health. More information can also aid in treating traumatic brain injuries. The subarachnoidal lymphatic-like membrane contains its own central nervous system immune cells. The discovery of this anatomical structure demonstrates there is much more to learn about immune system response and the nervous system.
