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 onset of conditions like Alzheimers.

While many may claim to have overcome the need for sleep, and some actually feel productive. And claim to be just as effective. No one should be in doubt that long term effects of sleep deprivation is devastating. Not only to the Brain, and the body as many studies have shown.