Larry Swanson is University Professor and Appleman Professor of Biological Sciences and a member of the Neurobiology faculty at USC, where he directs a laboratory investigating brain systems that control motivation and emotion. His recent book Brain Architecture: Understanding the Basic Plan presents a new theory of nervous system organization, and his atlas Brain Maps is in its third edition. He and his wife, Neely, have translated three classic works of Santiago Ramon y Cajal (1852-1934), the Nobel Prize-winning founder of modern neuroscience, including his 2,000-page masterpiece Histology of the Nervous System and the surprisingly popular Advice to a Young Investigator. Dr. Swanson was previously at Washington University and the Salk Institute and is an elected member of the National Academy of Science, a fellow of the American Association for the Advancement of Science and a fellow of the American Academy of Arts and Sciences.