Because it is a 'use it or lose it' brain, when we develop a map area [in the brain], we long to keep it activated. Just as our muscles become impatient for exercise if we've been sitting all day.
Norman Doidge (2007). “The Brain That Changes Itself: Stories of Personal Triumph from the Frontiers of Brain Science”, p.108, Penguin
![Because it is a 'use it or lose it' brain, when we develop a map area [in the brain], we long to keep it activated. Just as our muscles become impatient for exercise if we've been sitting all day.](http://cdn.quoteddaily.com/images/norman-doidge/because-it-is-a-use-it-or-lose-it-brain-when-we-develop-a-map-area-in-the-brain-we.jpg)