http://www.psychologytoday.com/blog/memory-medic/201303/what-learning-cursive-does-your-brain?tr=MostViewed

What we do with our hands changes what our brains -are- and may become. Radically. And when we develop our minds and brain this results in -new options for the hand-. This matters most in childhood, but remains crucial throughout our lifetimes. Our hands are ‘living invitations to learning and superfunction — active and developmental’.