Contrary to the popular "10%" myth, most of the brain is indeed active all the time. It's true that every part of the brain may not operate simultaneously, but as neurologist John Henley told Scientific American in 2008, "Evidence would show over a day you use 100 percent of the brain."
Do You Use Only 10% Of Your Brain?
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Key Facts In This Video
There are two major types of brain cells: neurons and glia. 00:40
Glia help to repair damaged neurons so that the brain can function properly. 01:17
Different parts of the brain are active during different tasks, from walking to making memories. 01:36