or many years, scientists believed that the adolescent brain was essen- Over the last decade, however, neurology and neu- roscience have revealed that the teen years encompass vitally important stages of brain development. Interweaving clear summary and analysis of research data with anecdotes drawn from her years as a clinician, researcher, and public speaker, renowned neurologist Frances E. Jensen, MD, explores adolescent brain functioning and development in the context of learning and multitasking, stress and memory, sleep, addiction, and decision making. The Teenage Brain explains how these eye-opening findings not only dispel commonly held myths about teens but also yield practical suggestions for adults and teenagers negotiating the mysterious and magical world of adolescent biology. FRANCES E. JENSEN, MD, is Professor and Chair of the Department of Neurology at the Perelman School of Medicine, University of Pennsylva-nia. She was Professor of Neurology at Harvard Medical School, Director of Translational Neuroscience and Director of Epilepsy Research at Boston Children's Hospital, and Senior Neurologist at Boston Children's and Brigham and Women's Hospitals. She lectures widely about the teen brain at science museums, TEDMED, and high schools. AMY ELLIS NUTT is a science journalist at the Washington Post and the recipient of a Pulitzer Prize in feature writing. Her most recent book is Becoming Nicole: The Transformation of an American Family.