Attention Deficit Hyperactivity Disorder (ADHD) Imagine living in a world where sights, sounds, images and thoughts are constantly changing and shifting. Unable to focus on whatever task is at hand, your mind wanders from one activity or thought to the next. Sometimes you become so lost among all the thoughts and images that you don't even notice when someone is speaking to you. This is what it is like for many people who have Attention Deficit Hyperactivity Disorder, or ADHD. Once called hyperkinesis or minimal brain dysfunction, ADHD is one ....