In answer to many of your questions this is what I found on the site of my therapist
What is Eye Movement Desensitization and Reprocessing (EMDR)…
This is a powerful therapy developed originally to assist Vietnam Vets with Post Traumatic Stress Disorder. It has proven to be helpful with not only PTSD, but also anxiety and panic disorder as well as negative thinking and beliefs. Studies have shown positive use for the therapy in the areas of headache management as well. It is being used to obtain greater creativity and even improved performance in various fields.
EMDR is usually combined with "talk therapy", such as other treatments mentioned in this section, for maximum results. When EMDR is successful the results are astonishing and many people have noticed shifts in their feelings that they didn't think possible. I am an EMDRIA Certified Therapist (please refer to www.emdria.org) with extensive ongoing, updated training.