Friday is the best day of the week for an easy question – so is glymphatic a word? Yes. It is a specialized form of the lymphatic system which exists in the brain to help with fluid flow between areas of the brain and from intracellular areas to the blood vessels. The g is added to refer to fact that glial type of brain cells work in combination with the brain’s lymphatic system – making it the glymphatic system. (pp 844-846, Neuroscience, 6th Ed.)
Slightly more interesting and more difficult easy question/answer – turns out the glymphatic system is most active while we sleep. The brain tissue shrinks quite a bit during sleep allowing easier fluid flow and likely facilitating movement of nutrients to the brain cells and removal of toxins from them. Since exercise and sleep are both linked to better health of myelin – more regeneration/less demyelination – is it likely that the better function of the glymphatic system is involved? — Probably but I have to read more about that idea. I just thought of it and likely others have thought of it before me and written medical papers about it but I only just learned of the glymphatic system today. (I enjoy words and health.)
Disclaimer: Opinions are my own and the information is provided for educational purposes within the guidelines of fair use. While I am a Registered Dietitian this information is not intended to provide individual health guidance. Please see a health professional for individual health care purposes.
Reference: pp 844-846, Neuroscience, 6th Edition, Editors D. Purves, G.J. Augustine, D. Fitzpatrick, W.C. Hall, A.S. LaMantia, R.D. Mooney, ML. Platt, L.E. White, (Sinauer Associates, Oxford University Press, 2018, New York) (Barnes&Noble)