https://www.biznutra.com/intelle-brain/
Intelle Brain D-Lack of Sleep: Prolonged period of sleepless nights or not sleeping enough hours for a long time can cause brain fatigue as well as body weakness. With brain fatigue, the brain starts to slow down and its energy decreases. When I say "the changing of brainwaves naturally", I mean changing by normal brain shifts because of what we do or even as a result on inducing the brain to change. Either way, the brain functions normally, and it is different from when the brain is under abnormal influences such as the four obstacles mentioned here.
