Book excerpt: Generations of mothers have been told -- and believed -- that having a baby means checking their own brains at the delivery room door. "The Mommy Brain" usually refers to a head full of feeding times, soccer schedules, and nursery rhymes, at the expense of creative or challenging ideas. But recent scientific research paints a dramatically different and far rosier picture. Journalist Katherine Ellison draws on cutting-edge neuroscience research to demonstrate that, contrary to long-established wisdom that having children dumbs you down, raising children may make moms smarter . From enhanced senses in pregnancy and early motherhood to the alertness and memory skills necessary to manage like a pro, to a greater aptitude for risk-taking and a talent for empathy and negotiation, these advantages not only help mothers in raising their children, but in their work and social lives as well. Filled with lively (and often hilarious) stories of multitasking moms at home and on the job, The Mommy Brain encourages all of us to cast aside conventional thinking and discover the positive ways in which having children changes mothers' brains for the better.