Neurologist; Clinical Professor of Neurology, George Washington University, who explores the ever-present problem of screen distractions and what we can do to keep them from overwhelming our dwindling attention span; Author, Your Stone Age Brain in the Screen Age: Coping with Digital Distraction and Sensory Overload (2024) and Synesthesia (2018); Co-Author, Wednesday is Indigo Blue (2011), which won the Montaigne Medal; and The Man Who Tasted Shapes (2003)