“Twenty years after that first recording in the laboratory, a cascade of well-controlled experiments with monkeys and later with humans (different kinds of experiments, for the most part; no needles inserted through skulls) have confirmed the remarkable phenomenon. The simple fact that a subset of the cells in our brains—the mirror neurons—fire when an individual kicks a soccer ball, sees a ball being kicked, hears a ball being kicked, and even just says or hears the word “kick” leads to amazing consequences and new understandings. THE FAB FOUR We now know that about 20 percent of the cells in area F5 of the macaque brain are mirror neurons; 80 percent are not.”