Your brain cleans itself while you sleep by squeezing brain cells to around 50% of normal volume during waking hours. Cerebrospinal fluid is for the “glymphatic system” — basically the brain’s lymph fluid.
Glymphatic: the G- stands for “Glial” cells in the brain.
–it’s mostly disconnected from the lymph system (by the blood-brain-barrier
–dumps waste into the lymph system, to be cleaned/excreted by the liver.
This process of course happens all the time, but mostly it’s dormant during waking hours. My feeling is, WBV focused in the head improves Glymphatic flow. However sufficient flow for cleaning is probably only possible during the late hours of sleep because brain cells have basically shrunk to allow more fluid flow around and between them. Without that free-space between them (during waking hours, during WBV time) then not much flow is achieved. Only more exchange between extracellular fluid and cells will happen.
At the end of this video, the guy says, “We may be able to modulate how this system functions to try to clear [amyloid beta] more quickly.”
After 8 or 9 hours of great sleep, I often feel like my head is swollen or heavy. Strange but feels good. It’s created during that last hour of sleep. This is probably the glymphatic cleaning. My point is that WBV can have a similar effect during the day, and I feel a long WBV session often increases the intensity of this glymphatic cleaning feeling the following morning.