How Does EMDR Actually Work?

One of the most common questions people ask about EMDR (Eye Movement Desensitisation and Reprocessing) is:

"How can moving my eyes back and forth help me heal?"

It's a great question. The truth is that researchers are still learning exactly how EMDR works. What we do know is that EMDR has a strong evidence base and helps many people recover from trauma, anxiety, distressing life experiences, and negative beliefs about themselves.

What's particularly interesting is that there isn't just one theory explaining EMDR. Instead, several different theories appear to explain different parts of the healing process.

Let's explore some of the leading ideas.

The Adaptive Information Processing (AIP) Model

The foundation of EMDR is called the Adaptive Information Processing (AIP) model, developed by EMDR's creator, Dr Francine Shapiro.

The AIP model suggests that our brains naturally have an inbuilt capacity to process experiences and integrate them into healthy learning. Most of the time this happens automatically.

For example, if you make a mistake at work, you might feel embarrassed initially, but eventually your brain processes the experience and stores it as a learning opportunity.

However, when an experience is particularly distressing, overwhelming, or emotionally significant, the brain's natural processing system can become disrupted. Instead of being stored as a normal memory, the experience becomes "stuck."

The emotions, body sensations, thoughts, and beliefs linked to that experience can remain frozen in time.

This is why years later, a person may still react to a situation as though the original event is happening right now.

EMDR is designed to help the brain restart and complete this natural processing process so that memories become integrated, adaptive, and less emotionally overwhelming.

The Orienting Response: "Something Changed—Am I Safe?"

One theory focuses on what psychologists call the Orienting Response.

This is the automatic response we all have when something in our environment captures our attention. Imagine hearing an unexpected sound and briefly turning your head to check whether everything is okay.

The alternating eye movements, tapping, or sounds used in EMDR may repeatedly activate this natural orienting response.

Each time the brain checks for danger and discovers that the person is actually safe, the nervous system may gradually learn that the memory itself is no longer a threat.

Over time, the emotional intensity attached to the memory can reduce.

Working Memory: Making Distressing Memories Less Vivid

Another well-supported theory involves working memory, which is the mental "workspace" we use to hold information in mind.

When you recall a distressing memory while simultaneously tracking eye movements or engaging in another bilateral stimulation task, both activities compete for working memory resources.

It's a little like trying to watch two screens at once.

Because the brain's resources are divided, the memory may become less vivid, less emotionally intense, and less overwhelming.

Many people notice that memories that once felt highly distressing begin to feel more distant or less emotionally charged after EMDR processing.

Similarities to REM Sleep

Some researchers have noticed intriguing similarities between EMDR and Rapid Eye Movement (REM) sleep, the stage of sleep most associated with dreaming.

During REM sleep, the brain appears to process experiences, consolidate memories, and integrate emotional learning.

The eye movements used during EMDR resemble some aspects of the eye movements that occur naturally during REM sleep.

This has led some researchers to propose that EMDR may activate similar brain processes, helping the brain digest and integrate experiences that have remained unresolved.

Enhancing Communication Across the Brain

Brain imaging studies suggest that trauma and highly distressing experiences can sometimes disrupt communication between different parts of the brain.

For example, emotional centres of the brain may become highly activated while areas involved in reasoning, perspective-taking, and language become less engaged.

Some researchers believe that the bilateral stimulation used in EMDR helps improve communication between different brain networks, allowing information to become more integrated.

One emerging area of research focuses on 40 Hz gamma brain waves, which appear to play a role in coordinating communication across multiple brain regions. Some researchers have suggested that EMDR may help promote synchronisation across these networks, allowing memories to be processed more effectively. Importantly, neuro imaging studies have found positive functional and structural changes in peoples' brains after receiving EMDR.

While this research is still developing, it offers an exciting glimpse into the complex neurological changes that occur during EMDR.

So Which Theory Is Correct?

The answer may be: all of them, at least partly.

Human beings are complex, and healing is rarely explained by a single mechanism.

EMDR likely works through a combination of processes involving memory, attention, learning, emotional regulation, nervous system calming, and communication between different parts of the brain.

What matters most is that EMDR appears to help the brain do something it was designed to do all along: process experiences, learn from them, and move forward.

Trusting Your Brain's Natural Capacity to Heal

One of the most hopeful aspects of EMDR is that it is not about forcing change or "thinking positively."

Instead, EMDR works with your brain's natural healing abilities.

Just as the body knows how to heal a physical wound, the brain often knows how to heal emotional wounds when given the right conditions.

If you're curious about EMDR or wondering whether it might be right for you, we invite you to contact the team at Drop of Life. We'd be happy to answer your questions and help you explore whether EMDR could be a helpful part of your journey toward healing and wellbeing.

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