According to the American Stroke Association, on average, someone in the United States experiences a stroke every 40 seconds. It's the leading cause of adult disability in the United States. Catherine Lang, director of the Neurorehabilitation Research Laboratory and professor of physical therapy, neurology, and occupational therapy at the School of Medicine at Washington University in St. Louis, wants to improve the ways that doctors and physical therapists help people recover from stroke. In this week's podcast, she shares some dramatic findings from one ongoing experiment.