Actually, the brain is designed to prune. You're born with way more neurons than you need, and you remove the ones that don't wire up properly as you grow. In f

Actually, the brain is designed to prune. You're born with way more neurons than you need, and you remove the ones that don't wire up properly as you grow. In fact, insufficient pruning probably leads to different diseases. (Was a neuroscientist, but not a neurologist, so I'm guessing epilepsy... and maybe some forms of autism?)