It's estimated one in five veterans of the wars in Afghanistan and Iraq suffers from traumatic brain injury, also known as TBI. Two years ago Vermont received a $951,000 grant to help veterans suffering from TBI find jobs. But to date only a handful of vets have taken advantage of the program. The reasons for this illustrate the challenges facing service providers and vets with brain injuries.

UVM professors Victor May and Jom Hammack have worked on a research project with the Emory School of Medicine. The research has found a link between a hormone and Post Traumatic Stress Disorder.

The UVM professors published in the scientific journal "Nature" work they've done with colleagues at Emory University. They say they've found a hormone in women's blood that's associated with anxiety. They say they believe it might also be linked to PTSD.

VPR's Steve Zind talks with Dr. Matthew Friedman about what researchers have learned about its causes and treatments, and the link between repeated deployments and increased risk of developing PTSD.