Current Events > 4th layer of brain discovered by scientists.

(+) Yeah! (+)

https://www.sciencealert.com/scientists-just-uncovered-a-whole-new-layer-of-brain-anatomy

University of Copenhagen molecular biologist Kjeld Mllgrd and colleagues have called their discovery the Subarachnoid LYmphatic-like Membrane (SLYM). While much of their research on this structure is so far from mice, using two-photon microscopy and dissections, they have confirmed the SLYM's presence in an adult human brain too.

The SLYM lies between two other membranes protecting the brain. It divides our brain fluid space in two, bringing the total number of known membranes encasing our brain up to four. It appears to act as a barrier for molecules in our brain fluid that are larger than around 3 kilodaltons; comparable to an extremely small protein.

literally SLYM