This technology, called electroencephalogram (EEG) or quantitative electroencephalogram (qEEG), has been around for many years. It can help diagnose ADHD by detecting brain-wave patterns that are distinctive to people with ADHD. People with ADHD have areas of their brains that are *under-aroused* or hypoaroused. When the ratio of under-aroused brainwaves is greater to active brain waves, it may indicate a disorder that responds well to stimulant medication. As stated by Edward Hallowell and John Ratey in Delivered from Distraction(2006), “New studies have shown that people who show the characteristic pattern of cortical hypoarousal are likely to respond well to stimulant medication. This provides