While we increasingly know more about the brain – some theories about it are just plain weird.
The brain is an intensely hungry organ – using around 20% of our body’s energy just to function normally.
Having an organ using copious energy doing mostly nothing is an evolutionary dead end if nothing else.
If we only used 10% natural selection means we’d only have that 10%.
Maybe we are indeed the end result of a primate with much larger brains they didn’t use?
Pity those poor fools and their basketball-sized-skulls.
There is however, a hint of truth to the claim.
While we do use all of our brains we don’t use all of it at once.
The way the energy supply of the brain is arranged, our bodies can’t supply enough to increase activity in all of the brain simultaneously – so only a small fraction of it can be ‘activated’ at once.
You know that old joke about why men struggle to think?
The one that ends with ‘only enough blood to run one at a time?’
It’s like that – only scientific.