What company are you calling from? http://thumbzilla.fun/ thumb zilla BENDEREV: And meanwhile, the scientists are tracking the brain activity of these college kids using an expensive magnetic coil and some sensors, looking at a particular system in the brain. It's called the mirror system. And it's the key to this entire study. Because the mirror system involves brain cells that become active when, for instance, you squeeze a rubber ball. But these brain cells also become active when you just watch somebody else squeeze a rubber ball. Which might not sound very profound but it goes deeper. Because, Obhi says, the mirror system also involves things like intentions.