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What Is EMDR Therapy? A Registered Psychologist Explains the Science, the Process, and Who It Can Help

If you have been researching therapy for trauma, anxiety, or grief, chances are you have come across the term EMDR. It gets mentioned a lot, but what it actually involves is often left unexplained.

EMDR stands for Eye Movement Desensitization and Reprocessing. It is one of the most well-researched therapies in the field of trauma psychology, endorsed by the World Health Organization and the American Psychological Association as a first-line treatment for PTSD. And yet, for many people, it still sounds unusual or hard to picture.

This post is for anyone who wants a clear, honest explanation of what EMDR is, how it works in the brain, what a real session actually looks like, and whether it might be the right fit for what you are going through.

What Is EMDR? A Plain-Language Explanation

EMDR is a structured, evidence-based therapy that helps the brain process memories that have become stuck. When we experience something distressing, the brain sometimes fails to file the memory away the way it normally would. Instead, it gets stored in a raw, activated state with all of its original emotions, sensations, and beliefs still attached. When something in the present triggers that memory, the brain and body respond almost as though the event is happening again right now.

EMDR uses a technique called bilateral stimulation, most commonly guided eye movements, to restart the brain's natural processing system. Over a series of short sets, the emotional charge attached to the memory reduces significantly. The memory does not disappear, but it stops functioning like an open wound. You can recall it without feeling overwhelmed by it.

The therapy was developed in the late 1980s by Dr. Francine Shapiro and has since accumulated decades of research support. It is now recommended by major health organizations in Canada, the United States, the United Kingdom, and internationally.

Why Do Some Memories Stay Stuck?

To understand why EMDR works, it helps to understand what trauma does to memory.

Under normal circumstances, the brain processes experiences during sleep, particularly during REM sleep. Emotions are metabolized, the memory is organized into a coherent narrative, and it gets stored as something that happened in the past. This is why, after a stressful week at work, you can eventually look back on it without the same level of distress you felt at the time.

With trauma, or with chronic stress and overwhelming experiences, this natural processing breaks down. The memory is stored in a fragmented, highly activated form. It retains the original images, sounds, physical sensations, and the negative beliefs that formed in the moment, things like "I am not safe," "It was my fault," or "I have no control."

EMDR researchers and clinicians believe that bilateral stimulation mimics what the brain does naturally during REM sleep, allowing those stuck memories to finally be processed and stored adaptively. The emotional charge reduces. The negative beliefs soften. The memory becomes something that belongs in the past rather than something that keeps pulling you back into it.

What Conditions Does EMDR Help With?

EMDR is most widely known as a trauma therapy, but the range of conditions it addresses is broader than many people realize.

 Post-traumatic stress and complex trauma

This is where the evidence base is strongest. EMDR is recognized as a first-line treatment for PTSD by the World Health Organization, the American Psychological Association, and the International Society for Traumatic Stress Studies. It is used for both single-incident trauma (such as an accident, assault, or medical emergency) and complex trauma involving repeated or prolonged difficult experiences over time.

Anxiety and panic

EMDR can address the underlying memories and experiences that fuel anxiety, rather than only managing symptoms. This includes generalized anxiety, panic disorder, social anxiety, and specific phobias where the fear response is tied to a particular memory or experience.

Grief and complicated loss

When grief becomes stuck, it is often because memories of the person or the loss itself feel too raw or overwhelming to sit with. EMDR can reduce the emotional intensity of those memories so that grief has more room to move through naturally, without becoming frozen.

 Depression rooted in past experiences

Depression does not always have an obvious external cause, but it frequently has roots in earlier experiences of failure, rejection, loss, or adverse childhood events. EMDR can work with those root memories rather than focusing only on current mood.

Distressing life experiences that are not clinical trauma

EMDR is not reserved for people who have experienced severe or catastrophic events. It is also effective for processing significant life experiences that continue to carry emotional weight: a painful divorce, a damaging work situation, a difficult relationship, a medical diagnosis, or a period of chronic stress that left its mark.

How EMDR Compares to Other Therapy Approaches

People often want to understand how EMDR differs from CBT (Cognitive Behavioural Therapy) or from general talk therapy before deciding whether to pursue it. Here is a straightforward comparison.

EMDR vs. talk therapy

Traditional talk therapy invites you to discuss your experiences in depth, working through them verbally with your therapist. EMDR is considerably less verbally intensive. You do not need to describe what happened in detail. The focus is on processing the memory rather than narrating it, which makes EMDR a useful option for people who find it difficult or retraumatizing to talk at length about what occurred.

EMDR vs. CBT

CBT focuses primarily on identifying and changing unhelpful thought patterns. It is highly effective, particularly for anxiety and depression. EMDR addresses cognition as well, but it works simultaneously at the emotional and physical level, targeting the stored memory itself rather than the current thinking patterns that stem from it. For trauma with a clear origin, EMDR often produces change more efficiently because it goes to the source.

Can they be combined?

Yes. EMDR is frequently used alongside other therapeutic approaches. At Flutterby Psychology, sessions are tailored to each client, and EMDR may be integrated with attachment-focused work, body awareness approaches, or other evidence-based methods depending on what you are working through.

What Happens in an EMDR Session? A Step-by-Step Picture

This is the question people most commonly ask when researching EMDR. Here is an honest account of what the process actually involves.

The early sessions: building a foundation

The first one or two sessions are not processing sessions at all. Your therapist will spend this time getting to know your history, understanding what you are hoping to work on, and introducing you to the stabilization and grounding tools you will use throughout the process. EMDR should not begin before you and your therapist both feel you are ready. This phase is non-negotiable and is built into the protocol for good reason.

Identifying what to work on

Once a foundation is established, you and your therapist will identify the specific memories, images, or experiences that are connected to your current distress. You will also identify the negative belief you hold about yourself in relation to that memory (for example, "I am powerless" or "I am to blame") and work toward a positive belief you would like to hold instead. This target memory becomes the focus of the processing work.

The processing itself

During a processing set, you hold the target memory lightly in your awareness while following your therapist's hand movements with your eyes. Each set lasts approximately 30 to 60 seconds. After each set, your therapist will simply ask what came up. You can share as much or as little as you like. There is no expectation to explain or interpret. This continues in repeated sets until the distress level associated with the memory reduces significantly.

Bilateral stimulation can also be delivered through auditory tones through headphones or through tapping, depending on client preference. All are considered equally effective.

Strengthening the positive

Once distress has reduced, your therapist will guide you to strengthen the positive belief you want to associate with the memory. A body scan follows, checking for any remaining tension or physical discomfort that may need attention.

Closing and grounding

Every session ends with a closure exercise. If the processing work is not fully complete, your therapist will use containment techniques to help you stabilize before leaving. You will not be left in an activated state at the end of a session.

How many sessions does it take?

This varies considerably depending on what you are working on. A single distressing event may resolve in two to four sessions of processing. Complex or developmental trauma typically requires a longer course of work. Your therapist will give you a clearer picture after the initial assessment, and the plan will be updated as you progress.

Questions People Ask About EMDR That Are Worth Addressing

Does EMDR require you to talk about what happened in detail?

No. This is one of the features that makes EMDR appealing to people who find it difficult to verbalize their experiences. You hold the memory in your awareness during processing, but you are not required to narrate it or describe it in detail. Your therapist works from your cues about the level of distress you are experiencing, not from the content of what happened.

Can EMDR be done virtually?

Yes, and virtual EMDR is well-supported by clinical research. Instead of following hand movements in person, clients can use the therapist's movements on screen, audio tones through headphones, or self-administered bilateral tapping. Flutterby Psychology offers virtual EMDR sessions for clients across Alberta.

Is EMDR suitable for children?

Yes. EMDR has been adapted for children and adolescents and has a strong evidence base in this age group. Sessions are modified to suit the child's developmental stage, communication style, and comfort level. At Flutterby Psychology, child EMDR is delivered with a play-informed and attachment-focused approach, and parents are involved as collaborative partners in the process.

What does EMDR feel like during a session?

Most clients describe it as more internal and less conversational than they expected. Some notice emotions, physical sensations, or images arising during the bilateral stimulation sets. Others notice a sense of distance from the memory or a shift in how they are holding it. Some sessions feel intense; others feel surprisingly gentle. Your therapist will check in throughout and adjust the pace based on how you are responding.

Are the effects of EMDR permanent?

Research indicates that the gains made through EMDR are generally durable. Once a memory has been processed, it typically does not regain its original level of emotional charge. However, new distressing experiences can create new targets for processing, and some clients return for additional sessions when new challenges arise. Think of it less like a one-time fix and more like building a capacity to process difficult experiences more effectively over time.

Is EMDR the Right Fit for You?

EMDR tends to be a particularly strong fit in the following situations:

  • There is a specific memory or experience that continues to feel distressing, intrusive, or unresolved
  • You experience flashbacks, nightmares, or strong emotional reactions that seem tied to something from the past
  • You have made progress in talk therapy but find that certain patterns or themes keep returning
  • You prefer a less verbally intensive approach, or find it difficult to put your experiences into words
  • You carry a strong negative belief about yourself that seems connected to a specific past experience
  • You are dealing with anxiety or grief that has a clear emotional origin

If none of these feel quite right but you are still curious about EMDR, that is worth a conversation too. The best way to know whether EMDR is a good fit is to talk it through with a therapist who can listen to your specific situation and give you an honest assessment.

Taking the Next Step

have to be a commitment to anything. Flutterby Psychology offers a free 15-minute discovery call so you can ask questions, get a sense of our approach, and decide whether EMDR with our team feels right for you.

We offer in-person sessions in Calgary (Southport SW) and Okotoks, and virtual sessions across Alberta.

To learn more about EMDR therapy at our practice, including how sessions are structured and what the approach looks like for different age groups, visit our EMDR Therapy page. Or reach out directly to book your discovery call.

Sources

The following sources informed this article and are recommended for readers who want to explore the research behind EMDR therapy.

1. World Health Organization (2013). Guidelines for the Management of Conditions Specifically Related to Stress. WHO Press. The WHO formally recommends EMDR as a first-line treatment for PTSD in adults and children, alongside trauma-focused CBT. Available at: https://www.who.int/publications/i/item/9789241505406 

2. Shapiro, F. (2018). Eye Movement Desensitization and Reprocessing (EMDR) Therapy: Basic Principles, Protocols, and Procedures (3rd ed.). Guilford Press. The foundational clinical text by the developer of EMDR, covering the theoretical model, the eight-phase protocol, and the evidence base. This is the primary reference used in EMDR training internationally.

3. Bisson, J.I., Roberts, N.P., Andrew, M., Cooper, R., and Lewis, C. (2013). Psychological therapies for chronic post-traumatic stress disorder (PTSD) in adults. Cochrane Database of Systematic Reviews, Issue 12. A high-quality systematic review comparing psychological treatments for PTSD, finding EMDR and trauma-focused CBT to be the most effective approaches. Available at: https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003388.pub4/full