PurpleFoot,

Multiple studies have been done in this area often showing mixed results. Almost any research in behavioral science (including trauma research) is difficult to prove using scientific standards because it is unethical to interfear with or manipulate a human being therefore variables cannot be tightly controlled. We can say there appears to be a relationship, but lack evidence to say there is scientific proof. With improved brian imaging, genetic studies and medical testing I hope we can better understand how the mind and body work together. This to me is key in understanding and treating CRPS and so many other illnesses. If anyone is interesting I can provide links to studies or this may have been quite enough (or too much) of an answer. ~mac