EMDR (Eye Movement Desensitization and Reprocessing) therapy follows eight structured phases that move from gathering your history through actively reprocessing traumatic memories to checking that the results hold. A typical session runs 60 to 90 minutes, and a single traumatic memory can often be fully reprocessed in about three sessions, though the entire eight-phase process from start to finish takes longer depending on your history.
EMDR is one of the most widely endorsed treatments for PTSD. It carries the highest recommendation from the VA/Department of Defense, the International Society for Traumatic Stress Studies, the UK’s National Institute for Health and Clinical Excellence, and Australia’s National Health and Medical Research Council. The theory behind it holds that traumatic memories get stored in a way that blocks normal processing. Bilateral stimulation, most commonly guided eye movements, is thought to remove those blocks so the brain can finish processing the memory and reduce trauma symptoms.
Phase 1: History and Treatment Planning
The first phase is an extended intake. Your therapist maps out your background: the specific events that brought you to therapy, your current symptoms, and the life experiences that may be fueling them. This includes questions about identity, culture, health, and the relationship dynamics that shape how safe you feel in the room. The goal is to build a treatment plan that identifies which memories to target and in what order. Phase 1 typically takes one to two sessions at the start of therapy, though your therapist may revisit it later if new issues surface.
Phase 2: Preparation
Before you process any traumatic material, your therapist makes sure you have tools to manage intense emotions. This phase is about building stability. You’ll learn techniques like slow breathing exercises, guided visualizations of a safe or calming place, grounding exercises that connect you to your senses, and tapping. Some therapists also use a gentle technique called the flash technique, which briefly and lightly exposes you to the traumatic memory to reduce its intensity before deeper processing begins.
These coping skills aren’t just for sessions. They’re designed so you can use them between appointments if distressing material comes up on its own. For most people, preparation takes one to four sessions. If you have a complex trauma history or certain diagnoses, your therapist may spend more time here to make sure you feel genuinely stable before moving forward.
Phase 3: Assessment
In this phase, your therapist helps you identify the specific components of the memory you’ll target. That means pinpointing a vivid 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 (“I am safe now” or “I did the best I could”).
Two scales set the baseline. The SUD scale (Subjective Units of Disturbance) rates your emotional distress from 0 to 10, where 0 is no distress and 10 is the worst you can imagine. The VOC scale (Validity of Cognition) measures how true the positive belief feels to you on a scale of 1 to 7, where 1 means it feels completely false and 7 means it feels completely true. These numbers give you and your therapist a concrete way to track progress through the remaining phases.
Phase 4: Desensitization
This is where the core work happens. Your therapist asks you to hold the target memory in mind while following a form of bilateral stimulation, most often their finger moving back and forth across your field of vision. Other options include tapping on alternating sides of your body or listening to tones that alternate between ears.
During sets of bilateral stimulation, your mind naturally moves through associations. You might jump from the original memory to a related one, notice a shift in emotion, or experience a physical sensation. After each set, your therapist checks in briefly and lets the processing continue. The aim is to bring your SUD rating down to 0, meaning the memory no longer triggers emotional distress. This phase can take one session or several, depending on how deeply embedded the memory is and what associations arise.
Phase 5: Installation
Once the distress has cleared, the focus shifts to strengthening the positive belief you identified back in Phase 3. Your therapist pairs that belief with the original memory during additional sets of bilateral stimulation. The goal is for the positive cognition to feel completely true, reaching a 7 on the VOC scale. Where desensitization removes the emotional charge, installation replaces the old negative self-belief with something more accurate and adaptive.
Phase 6: Body Scan
Trauma often lives in the body as much as in thought. After the positive belief is installed, your therapist asks you to think about the original memory and the new belief while scanning your body from head to toe. You’re looking for any residual tension, tightness, nausea, or other physical sensations. If something shows up, your therapist uses additional bilateral stimulation to process it. A session is considered complete for that memory only when your body is entirely clear of disturbance.
Phase 7: Closure
Every session ends with closure, whether or not reprocessing is complete. If processing finished, this phase is straightforward: your therapist checks in with you and ensures you feel stable. If processing is still incomplete (which is normal, especially with complex memories), your therapist uses the stabilization and grounding techniques from Phase 2 to bring you back to equilibrium before you leave the office.
Your therapist will also prepare you for what might come up between sessions. It’s common for new memories, dreams, or emotions to surface after reprocessing work. Journaling or using the coping tools from Phase 2 can help you manage anything that arises without feeling overwhelmed.
Phase 8: Reevaluation
Every new session opens with reevaluation. Your therapist checks whether the gains from the previous session held. Did the memory stay neutral? Did new distressing material emerge during the week? Are there related memories that now need attention? If the target memory still registers as a 0 on the SUD scale and the positive belief still feels fully true at a VOC of 7, you move on to the next target. If not, you return to Phase 4 and continue processing.
This phase is what makes EMDR cumulative rather than a one-time intervention. Over weeks or months, you work through the memories on your treatment plan one by one, with reevaluation ensuring nothing gets left partially processed. For a single traumatic event, full reprocessing typically takes about three sessions. More complex histories with multiple traumas naturally require a longer course of treatment, but noticeable improvement usually appears early.