Does Your Brain Burn More Calories When You Think Hard?
Taking the SAT, crunching through a tough problem at work, or even concentrating while driving in difficult conditions can leave you feeling physically exhausted. But does thinking really hard burn more calories, or does the exhaustion come from somewhere else?
Ferris Jabr from Scientific American wondered just that, and ended up writing a really interesting essay about the phenomenon. Firstly, he points out, there’s no denying that the brain works hard: