Meet the Expert: Dr. Nancy Cowdin/Hennessy, neuroscientist and teacher Dr. Nancy Cowdin Hennessy earned a Ph.D. in neuroscience from Georgetown University in Washington, D.C. (2015). Her research included a study of trauma, PTSD, and mindfulness training in battered women; she also conducted research with Howard University studying the effects of trauma on sleep patterns of… Continue Reading Episode 128: Why Do We Need Sleep?