EMDR Therapy: How Eye Movement Desensitization and Reprocessing Works, What It Treats, and What to Expect

Eye Movement Desensitization and Reprocessing (EMDR) is a structured psychotherapy approach developed by psychologist Francine Shapiro in 1987. Originally designed to treat post-traumatic stress disorder (PTSD), EMDR has since been applied to a range of mental health conditions rooted in distressing or traumatic experiences.

Unlike traditional talk therapies that focus heavily on verbal processing of traumatic content, EMDR uses a distinctive technique: bilateral stimulation — most commonly guided eye movements, but also tapping or auditory tones — while the person briefly focuses on a traumatic memory. The goal is to help the brain reprocess "stuck" memories so they no longer trigger intense emotional and physiological responses.

EMDR is recognized as an effective trauma treatment by several major health organizations, including the World Health Organization (WHO), the American Psychological Association (APA), the U.S. Department of Veterans Affairs (VA), and the International Society for Traumatic Stress Studies (ISTSS). The WHO's 2013 guidelines on conditions specifically related to stress recommend EMDR as one of only two psychotherapies for adults with PTSD — the other being cognitive behavioral therapy (CBT) with a trauma focus.

EMDR is grounded in the Adaptive Information Processing (AIP) model, which proposes that the brain has a natural mechanism for processing and integrating experiences into adaptive memory networks. According to this model, traumatic or highly distressing events can overwhelm this processing system, causing memories to be stored in an unprocessed or "frozen" state — complete with the original images, sounds, emotions, and body sensations experienced at the time of the event.

These inadequately processed memories are thought to be the foundation of many psychological symptoms. When triggered by present-day stimuli, they can produce reactions that feel as intense and immediate as the original experience — flashbacks, panic, overwhelming anxiety, or emotional numbness.

During EMDR, bilateral stimulation is applied while the individual holds a traumatic memory in mind. This process is believed to:

• Activate the brain's innate processing mechanisms, similar to what occurs during REM (rapid eye movement) sleep, when the brain naturally consolidates and integrates memories
• Reduce the vividness and emotional charge of the traumatic memory by facilitating connections between the distressing memory and more adaptive information already stored in the brain
• Allow the memory to be reconsolidated in a way that no longer produces the intense physiological and emotional responses

Notably, while the AIP model provides a clinical framework, the precise neurobiological mechanisms underlying EMDR's effectiveness remain an active area of research. Neuroimaging studies have shown changes in brain activation patterns following EMDR treatment — including reduced activity in the amygdala (the brain's threat detection center) and increased prefrontal cortex engagement — but researchers continue to investigate exactly how bilateral stimulation contributes to these changes.

EMDR follows a structured, eight-phase protocol that distinguishes it from other therapeutic approaches. Understanding these phases can help demystify what actually happens in treatment.

Phase 1: History-Taking and Treatment Planning

The therapist gathers a thorough history, identifies target memories for processing, and develops a treatment plan. This includes understanding current symptoms, past traumatic experiences, and the individual's readiness for processing work. This phase typically takes one to two sessions but can be longer for individuals with complex trauma histories.

Phase 2: Preparation

The therapist explains the EMDR process, sets expectations, and teaches self-regulation techniques — such as guided imagery, deep breathing, or a "safe place" exercise — that the individual can use to manage distress during and between sessions. Building a strong therapeutic alliance and ensuring the person has adequate coping resources is essential before moving to processing.

Phase 3: Assessment

A specific target memory is identified and its components are mapped: the most disturbing image associated with the event, a negative belief about oneself connected to the memory (e.g., "I am helpless"), a preferred positive belief (e.g., "I can handle challenges"), current emotions and their intensity, and physical sensations in the body. The therapist uses two scales: the Subjective Units of Disturbance (SUD) scale (0–10) to rate distress, and the Validity of Cognition (VOC) scale (1–7) to rate how true the positive belief feels.

Phase 4: Desensitization

This is the core processing phase. The individual focuses on the target memory while simultaneously engaging in bilateral stimulation — typically following the therapist's hand movements with their eyes in sets lasting 20–30 seconds. After each set, the therapist asks the person to briefly report what comes up — new thoughts, images, emotions, or sensations. Processing continues until the SUD rating drops to 0 or 1.

Phase 5: Installation

The positive cognition identified in Phase 3 is "installed" or strengthened by pairing it with the now-reprocessed memory using additional sets of bilateral stimulation. The goal is for the positive belief to feel genuinely true (VOC of 6 or 7).

Phase 6: Body Scan

The individual is asked to hold the target memory and positive belief in mind while scanning their body for any residual tension or discomfort. If physical sensations remain, additional bilateral stimulation is used to process them. This phase reflects the understanding that trauma is stored somatically as well as cognitively.

Phase 7: Closure

The therapist ensures the person returns to a state of equilibrium before ending the session, using the self-regulation techniques from Phase 2 if needed. The therapist also explains that processing may continue between sessions and encourages the person to keep a log of any new memories, dreams, or feelings that arise.

Phase 8: Reevaluation

At the beginning of each subsequent session, the therapist checks on the previously processed memory to ensure treatment gains have been maintained. If new aspects of the memory have surfaced, they are targeted in additional processing.

While EMDR was developed for and has the strongest evidence base in treating PTSD, its application has expanded considerably. Conditions for which EMDR is used include:

Conditions with strong evidence:

• Post-Traumatic Stress Disorder (PTSD) — This is EMDR's primary and most well-researched application. Multiple randomized controlled trials (RCTs) and meta-analyses support its effectiveness for both single-incident trauma and complex PTSD.
• Acute Stress Disorder — Early intervention with EMDR following a traumatic event has shown promise in preventing the development of chronic PTSD.

Conditions with growing evidence:

• Depression — particularly when depressive episodes are linked to identifiable adverse life events or traumatic experiences
• Anxiety disorders — including generalized anxiety disorder, panic disorder, social anxiety, and specific phobias
• Grief and complicated bereavement
• Childhood trauma and adverse childhood experiences (ACEs)
• Performance anxiety — in athletic, academic, or professional settings

Conditions with preliminary or emerging evidence:

• Obsessive-compulsive disorder (OCD)
• Chronic pain — particularly when pain is exacerbated by trauma history
• Substance use disorders — typically as an adjunct to other addiction treatments
• Body dysmorphic concerns and eating disorders
• Dissociative disorders — requiring specialized protocols and experienced clinicians

It is important to distinguish between the robust evidence for EMDR in treating PTSD and the more preliminary evidence for these other applications. Research is ongoing, and clinicians increasingly use EMDR as part of broader, integrated treatment plans for complex presentations.

EMDR is one of the most extensively researched psychotherapy treatments for trauma. Its evidence base includes dozens of randomized controlled trials, numerous meta-analyses, and endorsements from major health organizations worldwide.

Key findings from the research literature:

• A landmark meta-analysis published in the Journal of Clinical Psychology found that EMDR and trauma-focused CBT produce equivalent outcomes for PTSD, with both significantly outperforming waitlist controls and non-trauma-focused treatments.
• Research suggests that EMDR may achieve results in fewer sessions than some other trauma therapies. Some studies report significant PTSD symptom reduction in as few as three to six sessions for single-incident trauma, though complex trauma typically requires substantially more treatment.
• The VA/DoD Clinical Practice Guidelines for the management of PTSD rate EMDR as a "strongly recommended" treatment, placing it alongside prolonged exposure therapy and cognitive processing therapy.
• Studies with diverse populations — including combat veterans, sexual assault survivors, refugees, and children — have demonstrated EMDR's effectiveness across different types of traumatic experiences and demographic groups.
• Treatment gains from EMDR appear to be durable. Follow-up studies at 3, 12, and even 35 months post-treatment have found that symptom improvements are generally maintained.

Ongoing debates and limitations in the evidence:

Despite its strong track record, EMDR has not been without controversy. One persistent question involves the specific role of eye movements. Some researchers have argued that the therapeutic benefits come from the exposure and cognitive restructuring components rather than the bilateral stimulation itself. However, component studies — comparing EMDR with and without eye movements — have generally found that eye movements do contribute to treatment effects, particularly in reducing the vividness and emotionality of traumatic memories. A 2013 meta-analysis by Lee and Cuijpers in the Journal of Behavior Therapy and Experimental Psychiatry concluded that eye movements add a significant therapeutic benefit beyond the effects of the protocol alone.

Another area of ongoing research involves EMDR's effectiveness for complex PTSD — a pattern associated with repeated, prolonged trauma, often occurring in childhood. While results are promising, treatment for complex PTSD typically requires more sessions, greater attention to stabilization and affect regulation, and specialized clinical expertise.

People considering EMDR understandably want to know what the experience is actually like. Here is a realistic overview:

Session structure: EMDR sessions are typically 60 to 90 minutes, though some clinicians offer extended sessions (up to 2 hours) to allow adequate time for processing. The total number of sessions varies widely — from as few as 6 for straightforward single-incident trauma to 12 or more sessions for complex trauma presentations. Some individuals benefit from ongoing EMDR as part of longer-term therapy.

During processing: You remain fully conscious and in control throughout the session. Unlike hypnosis, you can stop the process at any time. Many people experience a rapid flow of images, thoughts, emotions, and physical sensations during bilateral stimulation sets. Some describe the experience as "watching a movie" of the memory from a distance. It is normal for the emotional intensity to initially increase before decreasing — this temporary activation is part of the processing.

Potential side effects and challenges:

• Heightened emotional distress during and immediately after sessions — This is the most common side effect. Processing traumatic material can temporarily intensify emotions such as sadness, anger, fear, or grief. This typically subsides within 24–72 hours.
• Vivid dreams or new memories surfacing between sessions — As the brain continues processing, previously suppressed material may emerge. This is generally considered a sign that processing is occurring.
• Lightheadedness, fatigue, or emotional sensitivity — Some people feel emotionally drained or physically tired after sessions, particularly early in treatment.
• Incomplete processing — If a session ends before a memory is fully processed, the individual may experience residual distress. This is managed through the closure techniques taught in Phase 2.

Who should exercise caution:

• Individuals with active suicidal ideation or self-harm behaviors should have these stabilized before beginning trauma processing.
• People with dissociative disorders require a therapist specifically trained in dissociation-informed EMDR protocols, as standard processing can overwhelm an already fragmented system.
• Those with certain neurological conditions, such as epilepsy, should discuss EMDR with both their neurologist and therapist.
• Individuals who are not yet able to tolerate distress may need more time in the preparation phase to build self-regulation skills before processing.

A skilled EMDR therapist will conduct thorough assessment and preparation to minimize risks and will not rush into processing work before the individual is ready.

The quality of EMDR therapy depends significantly on the training and experience of the clinician. Here is what to look for:

Credentials and training:

• Look for therapists who have completed EMDRIA-approved training. The EMDR International Association (EMDRIA) sets standards for training programs, which require a minimum of 50 hours of didactic and experiential instruction, plus 10 hours of supervised EMDR practice.
• EMDRIA Certified Therapists have met additional requirements beyond basic training, including a minimum number of completed EMDR sessions, additional consultation hours, and continuing education. This certification indicates a higher level of proficiency.
• EMDRIA Approved Consultants are the most experienced practitioners, qualified to supervise other therapists in EMDR.
• In other countries, look for therapists approved by the relevant EMDR national association (e.g., EMDR Europe, EMDR Asia).

Finding a provider:

• The EMDRIA Therapist Directory (emdria.org) allows you to search for trained and certified EMDR therapists by location.
• Psychology Today's therapist directory allows filtering by treatment approach, including EMDR.
• Your primary care physician, psychiatrist, or existing therapist can provide referrals.
• Veterans can access EMDR through the VA healthcare system, where it is a standard treatment for combat-related PTSD.

Questions to ask a potential provider:

• Where did you complete your EMDR training, and was it EMDRIA-approved?
• Are you EMDRIA certified or working toward certification?
• How many clients have you treated with EMDR?
• Do you have experience treating my specific concern (e.g., complex trauma, childhood abuse, combat trauma)?
• Do you follow the standard eight-phase protocol?
• How do you handle situations where processing becomes overwhelming?

Be cautious of practitioners who have only attended a brief weekend workshop or online-only training without supervised practice. EMDR involves working with deeply distressing material, and inadequate training can lead to incomplete processing or retraumatization.

Access to EMDR therapy involves several practical considerations that are important to understand before beginning treatment.

Cost:

• EMDR sessions are typically billed at the same rate as other psychotherapy sessions. Out-of-pocket costs in the United States generally range from $100 to $250+ per session, depending on the provider's credentials, location, and whether they offer 60- or 90-minute sessions.
• Because EMDR may require fewer total sessions than some other trauma therapies for straightforward presentations, the overall cost of treatment can sometimes be comparable to or lower than longer-term approaches.

Insurance coverage:

• Most insurance plans that cover mental health services will cover EMDR, as it is billed as psychotherapy using standard CPT codes (e.g., 90837 for individual psychotherapy, 53–60 minutes). EMDR is not typically billed under a separate, unique code.
• Contact your insurance provider to verify coverage, check whether the specific therapist is in-network, and understand your copay or deductible obligations.
• Medicare and Medicaid generally cover EMDR when provided by an eligible clinician.

Accessibility challenges:

• Provider availability can be limited, particularly in rural areas. There are significantly fewer EMDR-trained therapists than CBT-trained therapists in many regions.
• Telehealth EMDR has expanded access considerably since the COVID-19 pandemic. Research and clinical experience suggest that virtual EMDR can be effective, with bilateral stimulation delivered through on-screen visual cues, self-administered tapping ("butterfly hug" technique), or audio-based bilateral stimulation. However, some clinicians and clients prefer in-person sessions, particularly for complex trauma.
• Intensive EMDR programs — where sessions are conducted daily over a period of one to two weeks rather than weekly — have emerged as an option for people who want to accelerate treatment, live far from providers, or have difficulty maintaining weekly appointments. Early research on intensive formats is promising.
• Sliding scale and community resources: Some clinicians offer reduced-rate sessions. Community mental health centers and training clinics at universities may provide EMDR at lower cost.

EMDR is one of several evidence-based treatments for trauma and related conditions. Depending on individual needs, preferences, and availability, other options include:

Other evidence-based trauma therapies:

• Cognitive Processing Therapy (CPT) — A structured 12-session protocol that helps individuals identify and challenge unhelpful beliefs ("stuck points") that developed as a result of trauma. CPT has an equally strong evidence base for PTSD and does not involve bilateral stimulation.
• Prolonged Exposure Therapy (PE) — Involves gradually and repeatedly revisiting traumatic memories and engaging with avoided trauma-related situations in a safe, controlled way. PE has extensive research support and is considered a first-line PTSD treatment.
• Trauma-Focused Cognitive Behavioral Therapy (TF-CBT) — Specifically designed for children and adolescents who have experienced trauma. It incorporates trauma-sensitive interventions with CBT techniques and includes a caregiver component.

Other therapeutic approaches that may be used alongside or as alternatives to EMDR:

• Somatic Experiencing (SE) — Developed by Peter Levine, this body-oriented approach focuses on resolving trauma-related physiological activation without necessarily requiring detailed retelling of traumatic events.
• Internal Family Systems (IFS) — A model that works with different "parts" of the self that may carry trauma burdens. IFS is increasingly used for complex trauma and has a growing research base.
• Dialectical Behavior Therapy (DBT) — While not a trauma processing therapy per se, DBT's emphasis on distress tolerance, emotion regulation, and interpersonal skills makes it valuable for individuals who need stabilization before or alongside trauma work.
• Neurofeedback — A brain-based intervention that trains individuals to modify their brainwave patterns. Some clinicians use neurofeedback as an adjunct to EMDR or other trauma therapies, though its evidence base is less robust.

Medication:

Selective serotonin reuptake inhibitors (SSRIs) — specifically sertraline (Zoloft) and paroxetine (Paxil) — are FDA-approved for the treatment of PTSD and may be used alone or in combination with psychotherapy. Research suggests that psychotherapy, including EMDR, generally produces more durable effects than medication alone for PTSD, but medication can be an important component of treatment, particularly for managing acute symptoms or when therapy is not immediately accessible.

The choice between EMDR and other treatments depends on individual factors including the nature and complexity of the trauma, personal preferences, the availability of trained providers, and any co-occurring conditions. A thorough assessment by a qualified mental health professional is the best starting point for determining which approach is most appropriate.

If you are experiencing symptoms that may be related to traumatic or distressing life experiences, professional evaluation is an important first step. Consider reaching out to a mental health professional if you notice:

• Intrusive memories, flashbacks, or nightmares related to past events that interfere with your daily life
• Persistent avoidance of people, places, activities, or conversations that remind you of a distressing experience
• Emotional numbness, detachment, or difficulty experiencing positive emotions
• Hypervigilance, exaggerated startle response, or difficulty sleeping
• Intense emotional reactions that seem disproportionate to current situations and may be connected to past experiences
• Negative beliefs about yourself or the world — such as "I'm broken," "No one can be trusted," or "The world is completely dangerous" — that developed following adverse experiences
• Physical symptoms — such as chronic tension, pain, or gastrointestinal problems — that medical evaluation has not fully explained and that may be connected to stress or trauma

You do not need to meet full diagnostic criteria for PTSD to benefit from EMDR or other trauma-informed treatments. Many people carry the effects of adverse experiences — childhood emotional neglect, bullying, medical trauma, loss — that significantly impact their well-being without meeting the threshold for a formal PTSD diagnosis.

If you are in crisis: Contact the 988 Suicide & Crisis Lifeline by calling or texting 988. Veterans can press 1 for the Veterans Crisis Line. The Crisis Text Line is available by texting HOME to 741741.