EMDR is a therapeutic technique which has been in use in psychological work for about 30 years. It stands for Eye Movement Desensitization and Reprocessing, and the technique utilizes rapid eye movement (REM) in an awake state.
EMDR is most specifically applied to the emotional and psychological residuals of trauma, but it has also been successfully utilized in alleviating or diminishing anxiety and distress that arise from other causes.
It is hypothesized that in the REM sleep state we are integrating aspects of our waking experiences that we are unable to integrate with our conscious minds, and that we can employ this same autonomic phenomena intentionally towards the same end.
The good news is that it works much of the time. From my experience in using EMDR over the past 20 years, I find it to be a highly effective adjunctive therapy for many people. It is a technique that helps us bypass the tendency to intellectualize our experience while moving us into a sensate/emotional presence with it. Through this process, the crystallization of the trauma can be significantly dissolved.