If your neurons can’t find lactate or glycogen, they get exhausted—enabling other parts of your brain to call for attention. It’s sort of like your brain is a super-excited third-grade classroom: The star student—that is, whatever you’re trying to focus on—will get most of your attention. And if the star student got enough to eat and enough rest, it can be called on periodically throughout the day. If not, other excitable parts of your brain will get your attention. Then your mind will start to wander.
— Wait, What’s That? The Science Behind Why Your Mind Keeps Wandering | Fast Company | Business Innovation (via infoneer-pulse)