Mum is right, older people just don't seem to get it. They don't "get" any kind of mental illness that I've noticed. I think mental illnesses in general were much more of a stigma in the days when my grandparents were young. Not much was known about them then. PTSD wasn't even an official diagnosis, and it certainly wasn't known that it effected the brain, it was thought to be entirely psychological. I think Jen, Mum is right, concentrate on the physical aspects of PTSD maybe in that case, like that it does effect the brain. If they don't understand that well... they are hopelessly old and outdated! ;)