Before Neurophysiologist Giacomo Rizzolatti and his colleagues discovered a class of cells called "mirror neurons", scientists were under the impression that the brain has a set way to control and coordinate your body. Before Rizzolatti, it was believed that there were set parts of your brain responsible for action planning, meaning if you want to control or move your body your brain has the premotor and parietal cortexs to help you do so. In the mid 90s Rizzolatti how cells in the motor area of a monkey's brain was associated with planning hand and mouth movements. They were monitoring the cells while the monkey was grabbing raisins and eating them. Once the monkey took a break from eating the raisins, an experimenter reached for the raisins. Although the monkey did not reach for the raisins, it watched the experimenter do so and parts of the motor brain (motor cells) reacted as if the monkey was the one reaching for the raisins. Basically "monkey see, monkey brain do".