The human brain weighs 3 pounds and the number of neurons is about 100 billion. In an interview with Barry Gordon Scientific American at John Hopkins School of Medicine, Baltimore, almost all of the brain is active all the time. Now MRI (magnetic radiation imaging) can easily be understood by the brain's activity. Researchers also said that the brain is active even during sleep.
William James's name was found by researchers to find out the reason for the idea. He said in Science, Psychologist Journal in 1907 that people used only a small fraction of their mental resources. Then Dale Carnegie did the talking about 10% of the How to Win Friends and Influence People Book (published in 1936). Then I did not see it again, people became scurry everywhere using only 10 percent of the brain.
In addition, it is said that if all of the brain is used, all humans can become Newton or Einstein. In fact