If people only use ten percent of their brain what is the other ninty percent used for?

The other 90% is storage. Or it could possibly be some back knowledge. Another thing it could be is ideas. We really don't know a lot about our brains, and what we think we know is debatable. I really hope we learn more, because our brain is a very interesting specimen.

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Storage of the knowledge gained through the years. Like a hard drive, the data has to be saved somewhere. I have always felt that we really do use all of our brain, just not all at the same time. Another thought is that if someone used more than 10% would that be less space for data to be saved? Thus, allowing less information to be stored? Does that make the person smarter, or not? Like ram, the 10% is simply the area used to process the other 90%.

This is a myth. In reality, people use all of their brain for daily functioning. For example, the frontal lobe is largely believed to be the executive control system that coordinates all the activities of the brain. Or the limbic system that controls emotion and fear. As a side, it would not make sense from an evolutionary perspective or a practical perspectiveto have a brain as large and complex as ours and only use 10%. It would be a waste of space.

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Storage!!!

they use most of the brain but only up to 10% as much as they could use it. there are no unused parts. just under-used. each part has a role to fill and it can do more than being required to. it is like a computer with unused storage and ram. it could do more if required to but still you use most parts of it a little bit each day.

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