Dr. Michael Merzenich, PhD is a Professor Emeritus at the University of California at San Francisco, a member of both the National Academies of Science and the Institute of Medicine, and the co-founder of Scientific Learning and Posit Science. Often called "the father of brain plasticity," he is one of the scientists responsible for our current understanding of brain change across the lifespan. To learn more, visit www.soft-wired.com.