* Neurologist Barry Gordon, Johns Hopkins School of Medicine says that this is a false assumption, except for certain moments when we are simply at rest and thinking.

“It turns out though, that we use virtually every part of the brain, and that [most of] the brain is active almost all the time,” Gordon adds. “Let’s put it this way: the brain represents three percent of the body’s weight and uses 20% of the body’s energy.”

Source – https://www.scientificamerican.com/article/do-people-only-use-10-percent-of-their-brains/