What is EMDR therapy and how does it work?
Eye Movement Desensitization and Reprocessing (EMDR) is one of the most studied and widely recommended therapies for trauma. Here's a clear, grounded look at what it actually is, and why it works.
The Origins of EMDR
EMDR was developed in 1987 by psychologist Dr. Francine Shapiro, almost by accident. During a walk in a park, she noticed that distressing thoughts seemed to lose their emotional charge when her eyes moved rapidly from side to side. Intrigued, she began researching whether this effect could be replicated deliberately and therapeutically.
What followed was decades of clinical development and rigorous study. Today, EMDR is endorsed by major health organizations worldwide, including the World Health Organization (WHO), the American Psychological Association (APA), and the UK's National Institute for Health and Care Excellence (NICE).
What Is EMDR Used For?
EMDR was originally developed to treat Post-Traumatic Stress Disorder (PTSD), and it remains most closely associated with trauma. However, research has expanded its application considerably. It is now used to treat:
PTSD and complex trauma
Anxiety disorders and phobias
Depression
Grief and loss
Panic disorder
Childhood abuse and neglect
Performance anxiety
Chronic pain conditions
It is not a "talk therapy" in the traditional sense. Patients do not need to describe their trauma in detail, which makes it particularly valuable for people who find verbal processing re-traumatizing.
The Core Idea: How Trauma Gets "Stuck"
To understand EMDR, it helps to understand what trauma does to the brain.
When we experience something frightening or overwhelming, the brain's normal memory processing can break down. Under extreme stress, the hippocampus, the part of the brain responsible for consolidating memories, may struggle to file the experience away as a properly integrated past event. Instead, the memory can remain "frozen," stored with the same emotional intensity as when it first occurred.
This is why a trauma survivor can smell a particular scent, hear a sound, or see an image and feel, viscerally and physically, as though the event is happening right now. The memory was never fully processed. It's still raw.
EMDR aims to complete that interrupted processing, allowing the brain to finally file the traumatic memory as something that happened in the past, not something that is still happening.
The Eight Phases of EMDR
EMDR is a structured therapy delivered across eight distinct phases.
Phase 1 — History and Treatment Planning The therapist takes a thorough history and identifies the specific memories and experiences that will be targeted. Goals are established and the client's readiness is assessed.
Phase 2 — Preparation The therapist explains the EMDR process and teaches the client grounding and self-soothing techniques. This "emotional first aid kit" ensures the client can stabilize themselves between sessions if distress arises.
Phase 3 — Assessment The target memory is activated. The client identifies the most distressing image associated with the memory, a negative belief they hold about themselves because of it (e.g., "I am powerless"), and where they feel it in their body. They also identify a positive belief they would like to hold instead (e.g., "I am safe now").
Phase 4 — Desensitization This is the heart of EMDR. While holding the distressing memory in mind, the client follows the therapist's finger moving back and forth across their visual field, or receives alternating taps on each hand, or hears alternating tones in each ear. These are known as Bilateral Stimulation (BLS).
After each short set of BLS (typically 20–30 seconds), the therapist asks, "What came up for you?" The client reports whatever emerged — images, feelings, thoughts, bodily sensations — without judgment. The process continues, set by set, until the distress around the memory drops significantly.
Phase 5 — Installation The positive belief the client identified earlier is strengthened and "installed" using further BLS, until it feels genuinely true rather than just aspirationally true.
Phase 6 — Body Scan The client holds the target memory and the positive belief together while scanning their body for any remaining tension or discomfort. If any residual distress is found, it is processed further.
Phase 7 — Closure Each session ends with the client returning to a state of equilibrium. The therapist reminds them of their grounding tools and explains that processing may continue between sessions.
Phase 8 — Re-evaluation At the start of the next session, the therapist checks in to see whether the previous target still carries distress, and whether new memories or insights have emerged. The cycle continues until all targeted memories are resolved.
What Is Bilateral Stimulation, and Why Does It Work?
The most distinctive (and frequently questioned) element of EMDR is bilateral stimulation: the rhythmic, alternating activation of left and right sides of the body, most commonly through eye movements.
The honest answer is that scientists are still investigating the exact mechanism. Several theories have been proposed:
The Working Memory Hypothesis suggests that holding a distressing memory in mind while simultaneously tracking eye movements taxes the brain's working memory. Because attention is divided, the vividness and emotional intensity of the memory naturally decreases.
The REM Sleep Connection is perhaps the most compelling theory. Rapid Eye Movement (REM) sleep, when dreaming occurs, is the stage during which the brain processes and consolidates emotional memories. The side-to-side eye movements in EMDR closely mimic those of REM sleep, potentially triggering a similar processing mechanism while the person is awake.
The Orienting Response theory holds that rhythmic bilateral stimulation activates the brain's natural "what is that?" response - a relaxation reflex that evolved to help animals scan their environment for threats. This response may reduce the physiological arousal associated with the traumatic memory.
Eye movements are not the only form of bilateral stimulation used; tactile tapping and auditory tones work equally well, which suggests the specific type of stimulation matters less than the alternating, bilateral rhythm itself.
What Does an EMDR Session Actually Feel Like?
People often expect EMDR to feel dramatic or cathartic. In practice, it tends to feel more quietly transformative.
During desensitization, clients might experience a rapid succession of thoughts, images, or bodily sensations — like the brain fast-forwarding through associations. Some sessions bring tears or relief. Others feel almost unremarkable, only for the person to notice in the days that follow that something has shifted: the memory feels more distant, flatter, less charged.
A memory that previously felt like a live wire often ends up feeling like an old photograph — something you can look at without being pulled back into it.
Is EMDR Right for Everyone?
EMDR is not a universal treatment, and it is not without limitations.
It works best for trauma with identifiable triggering memories. It requires a person to be stable enough to tolerate temporarily activating painful memories.
It also requires a trained, licensed therapist. EMDR is not a technique to be self-administered or approximated. The therapeutic relationship, careful pacing, and clinical judgment are essential components of its safety and effectiveness.
The Bottom Line
EMDR is not a fringe or experimental therapy. Backed by decades of research and recommended by leading health bodies worldwide, it offers many people a path through trauma that does not require endlessly narrating what happened to them.
It works by doing something the traumatized brain was unable to do on its own: finishing the job of processing. When that happens, the past can finally become the past.
If you're considering EMDR, book a consult with Kritika - she is a trained EMDR practitioner.
