This study will determine if the type of gesture, increased quantity of an image, and the number of times a face is shown repeating a gesture bring about activation in the "mirror neurons." Researchers aim to learn about which areas of the brain are necessary to perform certain cognitive tasks-that is, relating to a person's thinking or remembering-especially visual and motor tasks. Because one way humans learn is by imitation, a mechanism is required to transfer the behavior the person adopts from others through observation. This type of learning could be based on a mechanism similar to that provided by mirror neurons. From previous studies it has been learned that the observation of hands and mouths has brought about the most effective ways of activating the mirror neurons.