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What's inside your body that weighs three pounds and has a 100 billion neurons? Hi,
I'm Janice Creneti, and this is, how much of your brain do humans actually use? The
brain, as I said, weighs about three pounds, and of course it sits up here in your skull.
Theres been a lot of research, a lot of studies, and scientist have actually very different
opinions about how much of your brain you actually use. A common number that's thrown
around is ten percent, this was a myth that people think might of been started by Dale
Carnegy. Well we're not exactly sure, and because it's very hard to measure here's what
we do know. There's lots of different parts of your brain, and each of the different parts
have different jobs. So it's pretty accurate to say that you use pretty much all of your
brain, it's just that you're not using all of those things at the same time. Lets take
a look at the brain and see what some of the parts are and what they do. Your brain is
considered to have three main components, the cerebrum, people sometimes call that grain
matter, the cerebellum and the medulla. The cerebrum is responsible for most of your thinking,
the cerebellum and the medulla do some of the simple body functions, your reflexes,
your muscle movements and things like that. So obviously during the coarse of the day
you make use of most of your brain.