The human brain

>> Even the
>> brightest among us use less than 10% of
>> their brain's potential.

>Where did you hear/see/read this?

Actually even I read about it - I think in a psychology101 book. They found out that only 10% of brain illuminated under some brain scanner. Dont remember the details.

But even though only 10% of the brain was illuminated, it still consumed 40% of all oxygen we breathe. So its not possible to start using more than 10% of the brain at one time.

I have heard that some people who do yoga know some way of breathing in and out slowly that reduces the amount of oxygen brain uses and so we can use more than 10% of our brains at one time. But am not sure if that is a rumour or if meditation and yoga helps. Haven't seen any scientific proof yet.

I too would like to know what phonics system of reading is.