From the FAQ at the EMDR International Association website. (If those are just a bunch of letters to you, there’s a tab marked ‘EMDR’ on this website, near the header, with lots information.)
There are 8 phases of EMDR treatment. Here’s a little information on phase 1:
Phase 1: History and Treatment Planning
Generally takes 1-2 sessions at the beginning of therapy, and can continue throughout the therapy, especially if new problems are revealed. In the first phase of EMDR treatment, the therapist takes a thorough history of the client and develops a treatment plan. This phase will include a discussion of the specific problem that has brought him into therapy, his behaviors stemming from that problem, and his symptoms. With this information, the therapist will develop a treatment plan that defines the specific targets on which to use EMDR. These targets include the event(s) from the past that created the problem, the present situations that cause distress, and the key skills or behaviors the client needs to learn for his future well-being. One of the unusual features of EMDR is that the person seeking treatment does not have to discuss any of his disturbing memories in detail. So while some individuals are comfortable, and even prefer, giving specifics, other people may present more of a general picture or outline. When the therapist asks, for example, “What event do you remember that made you feel worthless and useless?” the person may say, “It was something my brother did to me.” That is all the information the therapist needs to identify and target the event with EMDR.