Why does the size of a brain matter?

Question

I was watching the science channel, all though the subject matter of the show I was watching wasn't about the human brain, there was a debate about the size of the brain and the ability of our thought process, So the question comes down to this; if we are only using ten percent of our brain how can it be determined how smart someone was or is by the size of their brain, if we have at least ten percent of the average brain could we not use it fully and be fully functional?

Answer 1

It's a myth that we only use 10% of our brain.  We use it all.  The brain is an incredibly energy-expensive organ, and to have 90% of it doing nothing useful other than consuming oxygen would be a liability.  Brain scans reveal activity happening all over the brain, even when a person is resting.

Having said that, intelligent people don't use MORE of their brain, they probably just make connections in their existing brain matter more effectively.  There's a lot of debate about how that happens, so nobody can definitively tell you why some people seem to be more intelligent than others.  The size of one human brain compared to another wouldn't necessarily tell you who was more intelligent, however, unless a genetic defect caused one of the brains to be abnormally small and underdeveloped.

Between animal species, brain mass to body mass ratio is often used as a rough indicator of comparative intelligence, but even that doesn't always work out.  Intelligence is just a very tricky thing to pin down.

I hope that helps.  Good luck!

Answer 2

Its heriditory n nothing specilly to b mentioned.

At the most if at all v use 25% ,can become a scientist /research scholor.

Answer 3

I BELIEVE THE SIZE OF THE BRAIN WHEN IT COMES TO HUMANS,  DOS'NT MATTER AT ALL. THE BRAIN IS STILL VERY COMPLEX SO I WILL ELABORATE ON WHAT I KNOW.  I THINK THE BRAIN RECALLS MEMORY LIKE A COMPUTER, BUT ONLY SOME COMPUTERS ARE FASTER AT THIS, LIKE A PERSON RECALLING MEMORY,  FASTER THAN ANOTHER PERSON. IF YOU HAD TEN PERCENT OF THE AVERAGE BRAIN AND YOU DID NOT USE IT FULLY , YOU PROBABLY!! WOULD'NT BE FULLY FUNCTIONAL. JUST A GUESS THO.