Stimulant drugs are widely used in the treatment of ADHD in children and adults. Hundreds of studies over the past 60 years have demonstrated their effectiveness in improving attention span, increasing impulse control, and reducing hyperactivity and restlessness. Despite widespread interest in these compounds, however, their mechanisms of action in the central nervous system have remained poorly understood. Recent advances in the basic and clinical neurosciences now afford the possibility of elucidating these mechanisms. The current volume is the first to bring this expanding knowledge to...