There is a period during sleep where the body engages in rapidly flushing the brain of cerebrospinal fluids. This action is intensely physical and disturbing, however with the exception of the most serene true-insomniacs only a tiny fraction of people will directly experience it. They say this prevents the build up of harmful toxins in the brain, and that the failure to do this over time can be a contributor to the o…
This action is intensely physical and disturbing Can you expand on that?
Normally this enough to trigger alarm in the conscious and fully wake you up. But after this happens many times you can become expectant of it and just let it happen a little longer because you are not immediately alarmed.