EMDR (Eye Movement Desensitization and Reprocessing) is performed through an eight-phase protocol in which a therapist guides you to focus on a disturbing memory while simultaneously experiencing bilateral stimulation, most commonly side-to-side eye movements. Sessions typically last up to 90 minutes, are held weekly, and a full course of treatment runs about three months. But the eye movements people associate with EMDR are only one piece of a much more structured process.
The Theory Behind the Technique
EMDR is built on the idea that your brain has a natural system for processing difficult experiences, similar to how the rest of your body heals after a physical injury. Normally, when something upsetting happens, your brain files it away by connecting it to other memories, emotions, and knowledge you already have. Over time, the experience loses its emotional charge.
Sometimes that processing system gets stuck. A traumatic memory stays stored in its raw form, still carrying the original images, emotions, and body sensations from the moment it happened. That’s why a flashback can feel like you’re reliving an event rather than just remembering it. The memory hasn’t been properly integrated into the broader network of what you know and feel. EMDR aims to restart that stalled processing so the memory can finally be stored in a way that no longer triggers distress.
Phase 1: History Taking and Treatment Planning
The therapist starts by learning your history and building a picture of what brought you to therapy. Together, you identify specific memories, current triggers, and future situations that will become targets for treatment. The therapist uses direct questioning and other techniques to map out which experiences are driving your current symptoms and to decide which memories to address first. This phase also involves assessing your internal and external resources, meaning the coping skills you already have and the support systems around you.
Phase 2: Preparation
Before any memory work begins, the therapist explains exactly how EMDR works and what to expect during sessions. This is where you learn specific coping strategies, such as breathing techniques, guided imagery, or meditation, that you can use if strong emotions come up during or between sessions. The goal is to make sure you have reliable tools to calm yourself down, so that when the actual reprocessing starts, you’re not left overwhelmed.
Phase 3: Assessing the Target Memory
This phase is brief, sometimes taking as little as 30 seconds. The therapist asks you a series of questions designed to activate the specific memory you’ll be working on. You identify the most disturbing image associated with the event, the negative belief you hold about yourself because of it (something like “I’m not safe” or “It was my fault”), and the positive belief you’d rather feel instead. You also rate how disturbing the memory feels on a 0-to-10 scale and how true the positive belief feels. These ratings give the therapist baseline measurements to track your progress.
Phase 4: Desensitization
This is the phase most people picture when they think of EMDR. The therapist asks you to hold the traumatic memory in mind, including the image, the negative belief, and whatever emotions and body sensations come with it. While you focus on the memory, the therapist begins bilateral stimulation.
Bilateral stimulation means activating both sides of your brain in an alternating pattern. The most common method involves following the therapist’s fingers with your eyes as they move back and forth. But it doesn’t have to be visual. Some therapists use alternating tones played through headphones (one ear, then the other), or gentle taps on your hands or knees. All three forms follow the same left-right-left-right rhythm.
During each set of bilateral stimulation, new thoughts, feelings, images, or sensations often surface. The therapist pauses between sets to check in, asking what’s coming up for you. You don’t need to narrate the whole experience, just report what you noticed. Then the therapist directs you to focus on whatever emerged and starts another set. This continues, set after set, until your distress rating drops to zero (or close to it). Some memories resolve in a single session. Others take multiple sessions to fully process.
Phase 5: Installing a Positive Belief
Once the memory no longer triggers distress, the therapist shifts focus to the positive belief you identified earlier. You hold the original memory in mind alongside this new way of thinking about yourself, and the therapist applies more bilateral stimulation. The goal is to strengthen the connection between the memory and the positive belief until it feels genuinely true, not just intellectually but emotionally. You rate how strongly you believe it, and the process continues until that rating is as high as it can go.
Phase 6: Body Scan
Trauma often lives in the body as much as in the mind. After the positive belief is installed, the therapist asks you to think about the original memory and the new belief while slowly scanning your body from head to toe. If you notice any tension, tightness, nausea, or other physical discomfort, the therapist applies additional bilateral stimulation to process those remaining sensations. The session moves forward only when you can think about the memory without any residual physical disturbance.
Phase 7: Closure
Every session ends with closure, whether the memory has been fully processed or not. The therapist helps you return to a calm, grounded state before you leave. If the memory isn’t completely resolved, the therapist explains that processing can continue between sessions and reminds you of the coping strategies you learned in the preparation phase. You might notice new memories, dreams, or thoughts surfacing during the week, and the therapist typically asks you to keep a brief log of anything that comes up.
Phase 8: Reevaluation
Each new session opens with reevaluation. The therapist checks whether the progress from the previous session held. You revisit the memory you worked on and report your current level of distress. If it’s still low and the positive belief still feels strong, you move on to the next target memory. If distress has crept back up, you return to the desensitization phase for additional processing. This is also when the therapist reviews whether new targets have emerged and adjusts the treatment plan accordingly.
How Targets Are Selected
EMDR follows what’s called a three-pronged approach. The therapist starts with past memories that are driving your current symptoms, since those are the root of the problem. Once those are resolved, you address any present-day triggers that haven’t cleared up on their own. Finally, you work on future situations that you anticipate being difficult, rehearsing them with the positive beliefs you’ve developed so you feel prepared rather than anxious. This past-present-future sequence is designed to address the full scope of how a traumatic experience affects your life.
What a Typical Course of Treatment Looks Like
A standard course of EMDR involves weekly sessions of up to 90 minutes each, typically spanning about three months. The actual timeline varies depending on the complexity of your history. A single traumatic event, like a car accident, often resolves faster than trauma rooted in years of childhood experiences. The first few sessions focus entirely on phases 1 and 2, building your history and preparing you with coping tools. The active reprocessing phases (3 through 6) happen within individual sessions, sometimes cycling through multiple times in a single appointment. Phases 7 and 8 bookend every session from that point forward.
Unlike talk therapy, EMDR doesn’t require you to describe traumatic events in detail or complete homework assignments between sessions. The processing happens internally during bilateral stimulation, and the therapist guides the structure without needing a full verbal account of what you experienced.