What Is EMDR Therapy?
Eye Movement Desensitization and Reprocessing (EMDR) is a structured, trauma-focused psychotherapy that helps the brain process distressing or overwhelming experiences so they no longer feel raw, immediate, or threatening. Developed by Francine Shapiro in the late 1980s, EMDR has been studied across hundreds of clinical trials and is now recommended by organizations such as the World Health Organization and the U.S. Department of Veterans Affairs for treating posttraumatic stress disorder.
EMDR is based on the Adaptive Information Processing (AIP) model, which suggests that the brain typically integrates memories into a coherent network of meaning, emotion, and sensation. When an event is too overwhelming, this system can be disrupted. Instead of processing and resolving the event, the brain stores it in a raw form linked to sensory fragments, intense emotions, and negative beliefs such as “I’m not safe,” “It was my fault,” or “I’m powerless.” Current triggers can activate this unprocessed material, making the past feel like it is happening again.
EMDR helps the brain continue this disrupted processing so the memory becomes more integrated, less emotionally charged, and easier to hold from a grounded perspective. Research shows EMDR is as effective as trauma-focused cognitive behavioral therapy and sometimes more efficient, requiring fewer sessions to reach similar levels of improvement. EMDR is also increasingly used for anxiety, depression, medical trauma, and stress responses when trauma plays a contributing role.
What Happens in an EMDR Session?
EMDR follows an eight-phase protocol. From the client’s perspective, the process feels like three stages: preparation, reprocessing, and integration.
History-Taking and Treatment Planning
At the start of EMDR, you and your therapist build a clear picture of your history, current symptoms, strengths, stressors, and goals. You identify target memories, which may include single-incident traumas, patterns of relational stress, ongoing triggers, or future situations that evoke fear or avoidance.
Preparation and Resourcing
Before working with trauma memories, EMDR emphasizes stabilization. You learn grounding skills, breathwork, sensory regulation, and imagery practices such as creating a “calm place.” You also learn how to pause or stop processing if it becomes too intense. For clients with complex trauma or neurodivergent experiences, this phase is especially important because sensory or emotional overwhelm is more likely if the foundation is not firmly set.
Assessment: Selecting a Target
When ready to begin reprocessing, you choose a specific memory to target. You identify the worst snapshot of that memory, the negative belief connected to it, the belief you would rather feel, the emotions connected to the event, and the body sensations that arise. Distress is rated using a scale (0–10) to track changes throughout the session.
Desensitization: Bilateral Stimulation and Dual Attention
This is the part most people associate with EMDR. You bring up aspects of the memory while engaging in bilateral stimulation (BLS), such as eye movements, alternating taps, or alternating tones. Your therapist guides you through short sets, pausing to ask what you notice.
This “dual attention” keeps part of your awareness in the memory and part in the present moment. Research on working memory shows that performing a second task while recalling a disturbing image reduces its emotional charge and vividness. As processing continues, people often notice emotional shifts, new insights, or spontaneous connections that help the memory reorganize.
Installation of the Positive Belief
Once the emotional charge decreases, your therapist helps strengthen a more adaptive belief. Holding both the memory and the new belief in mind while using BLS helps the brain link them together in a more integrated, grounded way.
Body Scan
Even after emotional distress decreases, the body may still hold tension. You scan your body while remembering the event and the new belief. Residual tension is briefly processed until your physiology matches the cognitive and emotional shifts.
Closure
Each session ends with returning to safety and regulation. You use grounding skills or imagery to help your nervous system settle. Many clients notice dreams, emotional shifts, or new insights after sessions, which is normal as the brain continues processing.
Re-Evaluation
At the start of the next session, you and your therapist assess how the memory feels now, whether new material surfaced, and whether current triggers are shifting. Some targets complete in a single session; others require additional work.
How EMDR Works: What Research Shows
EMDR is one of the most extensively studied trauma therapies, with over three decades of clinical trials, neurobiological research, and real-world outcome studies. While multiple mechanisms likely interact, several themes consistently appear across the scientific literature.
Adaptive Information Processing (AIP)
The AIP model proposes that when a trauma overwhelms the brain’s natural capacity to process information, the memory becomes stored in a fragmented, “stuck” form. Research shows that EMDR reactivates these networks in a controlled way while also providing enough grounding for the brain to update them. Studies that examine memory reconsolidation—the window of time when a reactivated memory becomes malleable and research suggests EMDR may create ideal conditions for the brain to re-store the traumatic memory with less threat and more adaptive meaning.
Working Memory Taxation and Emotional Intensity
Hundreds of experimental studies have examined EMDR’s bilateral stimulation through the lens of working memory theory. Holding a disturbing image in mind while performing a secondary task (like eye movements or alternating tapping) uses cognitive resources that reduce the vividness and emotional charge of the memory. Clients frequently report that the memory becomes “farther away,” “blurrier,” or “less sharp,” which parallels findings in controlled laboratory settings. This mechanism may explain why EMDR can produce rapid reductions in emotional distress without requiring prolonged verbal exposure.
Shifts in Brain Activation
Neuroimaging studies have shown meaningful brain-level changes during and after EMDR:
• decreased activation in the amygdala (fear and threat detection)
• increased regulation from prefrontal regions involved in reasoning, perspective, and decision-making
• reduced activation in the insula, which tracks internal sensations and contributes to the intensity of emotional experience
• changes in connectivity between regions responsible for sensory memory, emotion, and executive functioning
These findings suggest EMDR helps the brain move from a state dominated by survival responses toward one where reflective thinking and emotional integration are possible.
Autonomic Nervous System Regulation
Several studies show measurable physiological shifts during EMDR, including reductions in heart rate, muscle tension, startle response, and sympathetic nervous system activation. EMDR appears to reliably evoke an orienting response—a natural reflex where the body pauses to assess new information—followed by a settling into parasympathetic regulation. This pattern supports the idea that EMDR helps the nervous system “unpair” old danger signals from present-day cues.
Memory Reconsolidation Processes
Research on reconsolidation indicates that when a traumatic memory is activated in a safe environment and then updated with new information, it becomes less distressing. EMDR’s structure—targeting a memory, activating it, and then allowing new insights and associations to emerge—matches this reconsolidation process. Clients often report spontaneous re-evaluations such as “I wasn’t to blame,” “I survived that,” or “I have choices now,” which mirrors what reconsolidation studies describe as “updating the prediction error.”
Comparative Effectiveness and Efficiency
Meta-analyses show EMDR is at least as effective as trauma-focused CBT and sometimes more efficient. Some studies find that EMDR may require fewer sessions to reach similar or greater symptom reductions. Importantly, EMDR does not require detailed verbal descriptions of trauma or extended homework assignments, which many clients find more tolerable.
Generalization of Gains
Clients often notice improvements not only in the targeted memory but also across unrelated areas of life—confidence, emotional regulation, relationship patterns, and reduction in chronic shame. Research suggests this happens when EMDR strengthens the brain’s ability to integrate new information into old networks, making global beliefs (“I’m safe,” “I’m capable,” “I’m not alone”) more available across contexts.
Impact on Comorbid Symptoms
Studies show EMDR can also lead to improvements in:
• depression symptoms linked to unresolved trauma
• panic symptoms and generalized anxiety
• somatic symptoms such as chronic pain, tension, and gastrointestinal distress
• negative self-referencing patterns, especially for clients with histories of childhood trauma
• sleep quality, including reduced nightmares
This broad impact aligns with trauma science showing that trauma disrupts multiple systems—emotional, cognitive, relational, and physiological—and that reprocessing trauma often creates improvements beyond the original target.
Intensive EMDR Formats
Emerging research on multi-day intensive EMDR suggests faster symptom reduction for some clients, including frontline responders, individuals with single-incident trauma, and people with limited availability. Intensives appear to maintain gains over time, further supporting EMDR’s efficiency when administered within a well-structured protocol.
Why This Matters for Clients
Clients often describe EMDR as providing three major benefits that are reflected in the research:
- Traumatic memories stop feeling like they are happening now.
The emotional charge drops, making the memory feel like a past event. - Body-based symptoms decrease.
Panic, hypervigilance, chronic tension, and startle reactions often reduce as the nervous system recalibrates. - Negative beliefs transform into more adaptive self-understanding.
Shame, self-blame, and long-standing internal narratives shift as the brain updates old predictions about safety, worth, and responsibility.
These changes collectively support the broader goal of trauma therapy: expanding a client’s ability to stay present, feel regulated, and access a wider range of choices in daily life.
EMDR for Neurodivergent Clients
EMDR is increasingly used with autistic and ADHD clients, many of whom experience trauma from sensory overload, chronic invalidation, bullying, medical procedures, or masking.
Research with autistic adolescents shows reductions in stress and confusion following EMDR. Studies with autistic adults suggest EMDR is feasible and effective when adapted for sensory and communication needs. Surveys of EMDR clinicians emphasize the importance of pacing, environmental adjustments, and alternative forms of bilateral stimulation.
For ADHD, EMDR can help reduce shame, fear of failure, emotional reactivity, and trauma linked to repeated criticism or unmet expectations.
Neurodiversity-affirming EMDR adaptations often include:
• sensory-friendly environments
• slower pacing and longer preparation
• tactile or auditory BLS instead of visual stimulation
• visual aids or written communication
• integrating special interests
• predictable structure and optional breaks
These adjustments support regulation and reduce overwhelm so trauma processing can unfold with safety and clarity.
What EMDR Feels Like Over Time
Clients often describe EMDR as emotionally meaningful but contained. Over time, people typically notice that: the memory feels more distant, triggers lessen, body tension decreases, emotional reactions become more manageable, and new positive beliefs begin to feel authentic. EMDR does not erase history; it helps the nervous system release the intensity that once made the memory hard to live with.
Recommended Books
• Francine Shapiro — Getting Past Your Past
• Francine Shapiro — EMDR Therapy: Basic Principles, Protocols, and Procedures
• Arielle Schwartz — many of her texts are informative for clients
Recommended Websites
• EMDR International Association (EMDRIA)
• EMDR Institute
• U.S. Department of Veterans Affairs: EMDR overview
• EMDRIA articles on autism, ADHD, and neurodiversity-affirming adaptations
Recommended Podcasts
• Notice That: An EMDR Podcast
• The EMDR Podcast
FAQ
Is EMDR evidence-based?
Yes. EMDR is supported by multiple meta-analyses and recommended by major PTSD treatment guidelines.
How many sessions will I need?
Single-incident trauma may shift in 6–12 sessions. Complex trauma often requires a longer course of therapy.
Is EMDR safe for autism, ADHD, or dissociation?
Yes, with proper pacing, sensory adaptations, and clear preparation. Research supports its use with neurodivergent clients.
What if I don’t like eye movements?
Tapping, tones, or hand-held buzzers can be used instead.
Can EMDR be done online?
Yes. Online protocols show promising results with adapted bilateral stimulation.
Does EMDR erase memories?
No. It reduces emotional intensity and helps memories integrate, but it does not erase them.
How do I know if my therapist is trained?
Look for EMDRIA-approved training and experience adapting EMDR for complex trauma and neurodivergent clients.
Jen McNaughton at Arnica Mental Health in Boulder, CO is trained in Level 1 and Level 2 EMDRIA-approved trainings. She has also continued her EMDR education to include courses on integrating EMDR with IFS, Parts with with EMDR, Play therapy with EMDR and using EMDR with children.
Bibliography
Carter, C. (2023). Working memory mechanisms in EMDR: A systematic review.
de Jongh, A., et al. (2024). State of the science: EMDR therapy. Journal of Traumatic Stress.
Leuning, E., et al. (2023). EMDR for daily stress in autistic adolescents. Frontiers in Psychiatry.
Lobregt-van Buuren, E., et al. (2018). EMDR for autistic adults with PTSD symptoms. European Journal of Psychotraumatology.
Rasines-Laudes, P., et al. (2023). EMDR for PTSD: A systematic review and meta-analysis. Psicothema.
Seok, J., et al. (2024). EMDR for depression: A meta-analysis. Psychiatry Investigation.
Wadji, D., et al. (2022). Working memory theory and EMDR efficacy. BMC Psychology.
Fisher, N., et al. (2022). EMDR with autistic individuals: A Delphi study. Psychology and Psychotherapy.
