Less than eight percent of the human brain was ever used.

More than 90 percent of the human brain is never used.

They were down on the left, in a clear area near the front view of the brain.

Changes to several areas of the brain are thought to be involved.

I would like very much to know what kind of brain he has.

As best I can figure out, only half of my brain has ever worked at all.

The back of his brain said to him, very clearly, Do you really think so?

The name was up in the front of his brain.

Are you really only using 10 percent of your brain?

Most important, I had the use of my brain back.