What is EMDR Therapy for Trauma ?

Everything you need to know

The Toolkit: How Does EMDR Reprocess Memory?

EMDR was discovered in 1987 by psychologist Dr. Francine Shapiro. The method uses bilateral stimulation (BLS), which simply means stimulating both sides of the brain in an alternating rhythm.

What is Bilateral Stimulation (BLS)?

BLS is the core mechanism of EMDR. It can take three common forms:

1. Eye Movements: Following the therapist’s fingers or a light bar moving back and forth across your field of vision (the original method).
2. Tappers (Tactile): Holding small, hand-held pulsars that gently buzz or vibrate in an alternating pattern (left hand, right hand, left hand, right hand).
3. Auditory: Listening to alternating tones or clicks through headphones (left ear, right ear, left ear, right ear).

Why Does BLS Work? (The Theory)

While scientists are still exploring the exact mechanisms, the leading theory suggests that BLS mimics the natural brain activity that occurs during REM (Rapid Eye Movement) sleep, which is when the brain naturally consolidates and processes memories from the day.

By inducing this back-and-forth rhythm while you are consciously holding the traumatic image and negative belief, EMDR essentially tricks the brain into entering a processing state. The memory becomes “unlocked” and can finally be digested, integrated, and filed away properly. This process is called adaptive information processing (AIP). The emotional intensity separates from the factual content of the memory.

8️ The Process: What Happens in a Session?

EMDR is conducted over eight structured phases. A full course of therapy might take anywhere from a few sessions (for single-incident trauma) to several months (for complex or developmental trauma), depending on the complexity of your history. The actual BLS work, known as the “reprocessing phase,” is only one part of the therapy, and it’s built upon the crucial groundwork of the preparation phases.

Phase 1 & 2: History and Preparation (Crucial for Safety!)

Before you touch any traumatic material, your therapist spends significant time building a strong foundation of safety, stability, and trust. This phase often takes one or more entire sessions.

• History: You and your therapist collaboratively identify the specific target memory (the “stuck” incident) you want to work on. You also identify past negative memories that contributed to the current problem and future positive goals you hope to achieve.
• Preparation: This is the most important part for preventing re-traumatization. Your therapist ensures you have multiple coping skills and resources to handle distress before the deep work starts. You might practice grounding techniques (bringing your awareness to the present moment) or learn how to activate a Safe/Calm Place in your imagination. This ensures you can stop the process at any time and regulate your nervous system.

Phase 3: Assessment—Targeting the Memory

In this phase, you pinpoint the exact “corrupted file” you are going to work on. You identify four key elements that define the memory’s emotional charge:

1. The Image: The worst, most defining, or most vivid part of the memory (e.g., the moment before the car crash or the look on someone’s face).
2. The Negative Cognition (NC): The self-blaming or self-diminishing belief you have about yourself as a result of the trauma (e.g., “I am unsafe,” “I am unlovable,” or “It was my fault”).
3. The Emotion: The strongest emotion you feel when you think about the image (e.g., fear, shame, disgust).
4. The Subjective Units of Disturbance (SUD): You rate the intensity of the distress from 0 (no disturbance/neutral) to 10 (highest possible disturbance).

Phase 4, 5, & 6: Reprocessing (The BLS Work)

This is the core healing part, involving the bilateral stimulation.

• Phase 4 (Desensitization): You hold the target image and the negative belief in your mind, and your therapist starts the bilateral stimulation. You simply notice whatever comes up—thoughts, feelings, images, body sensations, sounds. You are not meant to talk or try to force thoughts. The therapist will periodically pause (after a “set” of BLS) and ask, “What are you noticing now?” You report the change, and they start the BLS again. This is where the intensity (SUD score) slowly begins to drop as the brain processes the material.
• Phase 5 (Installation): Once your SUD score is low (usually 0 or 1), the memory is mostly desensitized. Now, you focus on the Positive Cognition (PC)—the healthy, true belief you want to replace the negative one with (e.g., changing “I am unsafe” to “I am safe now” or “I did the best I could”). The therapist uses BLS to help your brain deeply “install” this new positive belief, making it feel true at an emotional level.
• Phase 6 (Body Scan): Finally, you check your body while holding the installed positive belief. Since trauma is stored physically, you check for any lingering physical tension (e.g., in the jaw, shoulders, or stomach). If tension remains, BLS is used until the body feels calm and relaxed with the new, positive truth.

Phase 7 & 8: Closure and Re-evaluation

• Phase 7 (Closure): The therapist ensures you are grounded before leaving the session, often using the safe/calm place resource you practiced in Phase 2. If the memory is not fully processed, the therapist guides you on how to contain the material until the next session.
• Phase 8 (Re-evaluation): At the start of the next session, you revisit the target memory to ensure the distress score (SUD) remains low. If the memory is truly processed, it will feel neutral, distant, and firmly in the past, allowing you to recall the facts without the intense emotional punch.

What EMDR Feels Like (The Client Experience)

Many clients find EMDR surprising because it doesn’t rely on lengthy discussions or rational debate.

• It’s Active, Not Passive: You are actively engaged, but your job is to simply notice—to be an observer of your internal experience. You don’t have to try to “figure things out” or force anything. You let your brain do the work.
• It Can Be Emotional, But Contained: As the brain unlocks the memory, you might experience a surge of emotion, physical sensation, or a flood of new thoughts. This is normal and temporary. Because of the thorough preparation (Phase 2), you know you and your therapist can stop the process instantly to stabilize.
• The Memory Changes: The memory itself doesn’t disappear (you don’t forget the event), but its emotional charge fades drastically. The image might become blurry, smaller, less colorful, or simply lose its punch. The negative belief that was once concrete (“I am completely worthless”) transforms into an idea you can now logically dismiss (“I used to feel worthless, but I know that’s not true now”).

Stepping Into Freedom

If you’ve felt stuck in old reactions and painful memories, EMDR offers hope for a fundamental shift. It’s a process of giving your brain the simple biological boost it needs to finish the job of healing.

It is important to remember that EMDR should only be conducted by a certified, trained EMDR therapist. With the right guidance, you can clear the static of the past and step into a present moment that feels truly safe and free.