Are You Telling Me I Have an Unbalanced Brain?

As our brains become more lopsided, assignment of jobs between hemispheres becomes more different and more systematic. If a brain area has lots of different jobs, it's not going to become narrowly tuned to any one of those particular jobs. Having this kind of redundancy in the brain is really excellent because if you only have one part of the brain that can do one job and that part gets overwhelmed, you don't have what I've called spillover.