Our brain contains billions of nerve cells arranged in patterns that coordinate thought, emotion, behavior, movement, and sensation.
All parts of the brain work together, but each part is responsible for a specific function. They control everything from your heart rate, to your mood.
It is almost philosophical to think that our mental representations, imagery, reasoning, and reflections are generated by electrical activity of interconnected brain cells. And even more so is to think that these abstract phenomena of the mind could be enhanced by passing electricity through specific cellular networks in the brain.
Yet, it turns out these tenets can be subjected to empirical experimentation. Groundbreaking discoveries made by Dr. Wilder Penfield with his patients undergoing open-brain surgeries to treat epilepsy opened a new field of brain research exploring physiological substrates of human memory.