Book excerpt: What Goes On In My Head? will introduce readers to the most powerful and complicated computer network they will ever encounter - their own brain. It explains what the different parts of the brain do, how they work together and how scientists look at the brain. What Goes On In My Head? also explains how the brain changes at different stages in a person's life, how you learn to do things, what gives us our individual personalities, what memory is, and how illness affects the brain. Learn about why we had moods and emotions, why sleep is important, and much, much more! What Goes On In My Head? is packed with tips and brain teasers that will test memory, perception, reasoning, and reactions. Find out what really does go on in your brain!