EMDR Therapy Explained: What It Is and How It Works

You’ve probably heard of EMDR therapy—it’s been getting a lot of attention as a treatment for trauma, and for good reason. But the concept can sound strange at first: eye movements helping you process painful memories? How does that even work?

If you’re curious about EMDR, whether for yourself or someone you love, this guide will explain what it is, how it works, what a session looks like, and what the research says about its effectiveness.

What Is EMDR?

EMDR stands for Eye Movement Desensitization and Reprocessing. It’s a type of psychotherapy developed in the late 1980s by psychologist Francine Shapiro. She discovered that moving her eyes back and forth while thinking about disturbing thoughts seemed to reduce their intensity.

From that observation, she developed a structured therapy approach that uses bilateral stimulation—most commonly eye movements, but also taps or sounds—while processing traumatic or distressing memories.

EMDR doesn’t require talking in detail about the traumatic event, doesn’t involve homework, and doesn’t directly challenge your beliefs. Instead, it’s designed to help your brain process stuck memories so they no longer cause distress.

How Does EMDR Work?

The theory behind it

When something traumatic happens, your brain sometimes struggles to process the experience properly. It’s like a splinter that never healed—the memory gets “stuck” in your nervous system, still feeling raw and present even years later.

Normally, your brain processes experiences during sleep, particularly during REM (rapid eye movement) sleep when your eyes move back and forth naturally. This processing helps integrate memories so they become just memories—events from the past that no longer trigger intense emotional or physical reactions.

When memories are improperly stored, they can be triggered by current situations that resemble the original trauma. You might react with intense emotion, physical symptoms, or negative beliefs about yourself—all because your brain hasn’t processed that the danger is past.

EMDR appears to help reactivate your brain’s natural processing system. The bilateral stimulation may mimic what happens during REM sleep, allowing your brain to finally process and integrate the stuck memory.

What happens in the brain

Research using brain imaging shows that after EMDR treatment:

• The limbic system (emotional brain) shows reduced activity when recalling the traumatic memory
• The prefrontal cortex (thinking brain) becomes more active
• The memory shifts from feeling like it’s happening now to clearly being in the past

In other words, EMDR seems to help move memories from raw, emotional storage to properly processed, integrated storage.

What Does EMDR Treat?

EMDR was originally developed for PTSD (post-traumatic stress disorder), and that remains its most researched application. However, it’s now used for many other issues:

Primary uses:
– PTSD and trauma
– Single-incident trauma (accidents, assault, witnessing violence)
– Complex trauma and childhood abuse
– Disturbing memories

Additional applications:
– Anxiety disorders
– Panic attacks
– Phobias
– Depression
– Grief and loss
– Performance anxiety
– Chronic pain
– Addiction (as part of comprehensive treatment)

While the evidence is strongest for trauma-related issues, many therapists have found EMDR helpful for any condition rooted in disturbing life experiences or negative beliefs about oneself.

The Eight Phases of EMDR

EMDR follows a structured eight-phase approach:

Phase 1: History and Treatment Planning

Your therapist gathers your history, identifies potential targets for EMDR processing, and develops a treatment plan. You’ll discuss past events that have contributed to your current difficulties, current triggers, and future goals.

This phase helps your therapist understand which memories need processing and in what order.

Phase 2: Preparation

Before diving into trauma processing, your therapist will:

• Explain how EMDR works
• Build trust and rapport
• Teach you self-regulation techniques (like breathing exercises or visualization)
• Ensure you have ways to manage distress if it arises
• Answer your questions

This phase ensures you feel safe and have coping tools before beginning the more intensive work.

Phase 3: Assessment

You and your therapist identify a specific memory to target. For this memory, you’ll identify:

• Image: What picture represents the worst part of the memory?
• Negative cognition: What negative belief about yourself goes with this memory? (e.g., “I am powerless,” “I am not safe,” “I am worthless”)
• Positive cognition: What would you rather believe about yourself? (e.g., “I can handle it,” “I am safe now,” “I have worth”)
• Emotions: What emotions come up when you think about the memory?
• Body sensations: Where do you feel distress in your body?
• SUDs rating: On a scale of 0-10, how disturbing does the memory feel right now?
• VoC rating: On a scale of 1-7, how true does the positive cognition feel?

Phase 4: Desensitization

This is the core of EMDR processing. You’ll:

1. Hold the memory in mind (the image, the negative belief, and where you feel it in your body)
2. Follow your therapist’s fingers (or another form of bilateral stimulation) with your eyes as they move back and forth
3. Notice whatever comes up—new thoughts, feelings, memories, or body sensations
4. Briefly share what you noticed
5. Repeat the process, following whatever your brain brings up

This continues until the memory no longer causes significant distress. The therapist guides the process but doesn’t direct what should come up—your brain does the processing naturally.

Phase 5: Installation

Once the distressing memory feels neutral, you’ll focus on strengthening the positive belief you identified earlier. While holding the memory together with the positive cognition, you’ll do more sets of bilateral stimulation to “install” this healthier belief.

Phase 6: Body Scan

You’ll think about the original memory and the positive belief while scanning your body for any remaining tension or discomfort. If you notice residual sensations, you’ll process those with additional bilateral stimulation until your body feels clear.

Phase 7: Closure

At the end of each session, your therapist helps you return to a state of equilibrium. You’ll use the self-regulation techniques learned earlier if needed. Your therapist may also explain what to expect between sessions—sometimes processing continues, and new memories or feelings may emerge.

Phase 8: Reevaluation

At the beginning of subsequent sessions, your therapist checks on the previously processed memory. Is it still resolved? Have new issues emerged? This helps ensure thorough processing and guides what to work on next.

What a Session Feels Like

Everyone’s experience is different, but here’s what commonly happens:

During processing:

• You might see images or memories flash through your mind
• Emotions may intensify before decreasing
• Physical sensations may arise and shift
• You might make new connections you’ve never made before
• The memory may seem to change—become more distant, less vivid, or feel different

Common experiences:

• “It’s like watching a movie instead of being in it”
• “The memory feels farther away now”
• “I can think about it without my heart racing”
• “I realized it wasn’t my fault”
• “I feel lighter”

What’s normal:

• Feeling tired after sessions
• Having vivid dreams
• Experiencing continued processing between sessions
• Memories feeling temporarily more intense before improving
• Different memories surfacing

How Long Does EMDR Take?

The length of EMDR treatment varies significantly based on:

• Complexity and number of traumatic experiences
• How long ago the trauma occurred
• Your current support system and stability
• Whether you’re dealing with single-incident or complex trauma

General guidelines:

Type of Trauma	Typical Duration
Single adult trauma	6-12 sessions
Multiple traumas	12+ sessions
Complex/developmental trauma	Several months to years

Some people experience significant relief in just a few sessions. Others with extensive trauma histories may need longer-term treatment.

What the Research Says

EMDR has substantial research support, particularly for PTSD:

• Recognized as an effective PTSD treatment by the World Health Organization, American Psychological Association, and Department of Veterans Affairs
• Multiple meta-analyses show it’s as effective as trauma-focused CBT
• Some studies suggest it may work faster than traditional talk therapy for trauma
• Brain imaging studies show changes in how trauma memories are stored after treatment

While the exact mechanism is still debated among researchers, the effectiveness is well-established.

Is EMDR Right for You?

EMDR might be a good fit if:

• You have trauma or PTSD symptoms
• Talking about trauma feels overwhelming or hasn’t helped
• You want a structured, relatively time-limited approach
• You’re tired of the past controlling your present
• Traditional talk therapy hasn’t fully resolved your symptoms

EMDR might not be the best choice if:

• You’re in active crisis or are currently unsafe
• You have severe dissociative disorders (specialized preparation needed)
• You struggle with severe emotional instability
• You’re not willing to experience some discomfort during processing
• You have certain neurological or eye conditions (though alternatives exist)

A trained EMDR therapist can help assess whether it’s appropriate for your situation.

Finding an EMDR Therapist

When looking for an EMDR therapist:

• Verify they’ve completed EMDR training from a recognized program
• Ask about their experience with your specific concerns
• Look for therapists certified by EMDRIA (EMDR International Association) for additional credentials
• Make sure you feel comfortable with them—the therapeutic relationship matters

Common Questions About EMDR

Will I lose my memories?

No. The memories remain, but they lose their emotional charge. You’ll still remember what happened, but it will feel like history rather than something happening now.

Is it hypnosis?

No. You remain fully conscious and aware throughout. You can stop at any time.

Will I have to describe my trauma in detail?

Unlike some therapies, EMDR doesn’t require you to share every detail. Your therapist needs to know enough to guide the process, but you can process without verbally recounting everything.

Does it work for everyone?

Most people respond well to EMDR, but like any treatment, it doesn’t work for everyone. If it’s not helping, your therapist can adjust the approach or recommend alternatives.

Can I do EMDR online?

Yes. EMDR has been successfully adapted for telehealth, though some therapists prefer in-person work for certain clients.

Is it safe?

When conducted by a trained therapist, EMDR is considered safe. You may temporarily feel worse before feeling better as memories are processed, but your therapist will help you manage this.

What to Expect Moving Forward

Healing from trauma isn’t always linear. After EMDR, you might:

• Feel relief and freedom you haven’t experienced in years
• Notice triggers that used to overwhelm you no longer have the same power
• Have more emotional capacity for the present
• Discover new memories that need processing
• Need occasional follow-up sessions

Many people describe EMDR as transformative—not because it erases the past, but because it frees them from being controlled by it.

If trauma is impacting your life, EMDR offers a path forward. The past can become truly past, leaving you free to fully live in the present.

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This article is for educational purposes only and is not a substitute for professional mental health treatment. If you’re interested in EMDR therapy, please consult with a qualified mental health provider to discuss whether it’s appropriate for your needs.