Roxanne Prichard: When sleep eludes you

We've all experienced those nights at one time or another, when sleep just won't come. Lying awake worrying about things we often have no control over that can doubtless best wait until the light of day. Dr Roxanne Prichard is a Professor of Neuroscience and Psychology at the Center for College Sleep, University of St. Thomas in Minnesota. Her research has found that after midnight our minds are less equipped to problem-solve and more prone to find problems. Prichard takes us through the science that will help calm our mind and body.