Do you think that someone with split personality is only using the remaining percent of their unused brain?

Albert Einstein, says that "we use only 10% of our brain". Another version of this theory was said to be from some anonymous scientist (who is never named) supposedly discovered that we use only 10% of our brain.

Lastly, another version is that 10% of the mass of the brain is the conscious part of our brain, with the remaining 90% the subconscious part. What do you think?

I'd suggest that for those who solely rely on their only available 10% are those who are suffering from stroke of 90% of their remaining brain mass... could this be true?

This argument had been surfacing (and resurfacing) throughout the ages since the very first discovery of brain fuctions and so forth.

It would be really hard to explain why in this setting, but the idea of part of a brain being unused doesn't make any sense. It just doesn't work that way (no pun intended!). The only sense in which it would make sense to say that a certain percentage of a person's brain is unused is if it were physically disconnected from the rest of the brain and the body as a result of injury or something.

Don't think of the brain as a bunch of processing modules that each do some work and send information to another area for the next step. Don't think of it as being carved up into different areas responsible for different personality traits or thoughts, either.

Instead, you might think of it as a dense jungle of wires, only where the wires are actually do the "processing" at the same time that they transmit signals around. Moving the signals and modifying them happen simultaneously--they're inseparable.

Just because there's no activity detected in a particular corner of the jungle at a particular moment doesn't mean that area might as well not be there. The lack of activity in an area can itself be a kind of information. That an area isn't activated as a person processes sensory information about their immediate environment reveals something about what they're perceiving--or not perceiving, rather.

By the way, by describing it as a jungle I don't mean to imply that it's overgrown or sloppily wired-up. Neurons connect to very precise places and serve meaningful functions, and do it beautifully efficiently to boot.

If someone was actually using 100% of their brain, you would probably hear about them. They would be, by far, and objectively, the smartest person on Earth. I haven't heard of that person.

I think 10% of the brain work like a Processor and the rest is the memory and the 1000G disk!

People who used 10% of his brain created atomic bomb, if a person used 100% of the brain... I don't know what will happen to this world.

With all of the voices in my head, I think there would only be 10% left unused, which is where I retreat to, when I need to get away from all of the others.