What Dissociation Really Is and Why Your Parts Are Not the Problem
Episode 116
If you've ever found yourself lost in a conversation you can't remember starting, or noticed that parts of your childhood feel like someone else's life, or wondered why certain versions of you seem to take over without your permission , this post is for you.
Dissociation has a bad reputation it doesn't deserve. For decades it got tangled up in the controversy around DID (dissociative identity disorder), and the stigma stuck. But dissociation isn't a disorder. It's a mental ability. One of your nervous system's most sophisticated survival tools. And understanding it might be the thing that finally helps you make sense of your own experience.
I sat down with Dr. Janina Fisher, licensed clinical psychologist, former Harvard Medical School instructor, and one of the foremost experts in trauma and dissociation, to talk about all of it. What dissociation actually is, how it shows up, and what it might mean for you.
What Is Dissociation? (And Why It's Not What You Think)
Here's what most people don't know: dissociation isn't something that happens to broken people. It's something every human brain is capable of, because the brain built it that way on purpose.
As Dr. Fisher puts it, dissociation is the brain's ability to divide attention. And when it's working in our favor, it's actually essential. It's why a baseball player can lose a parent and then hit a home run the next day. It's how an ER nurse can hold complex clinical information and stay calm in a moment of crisis. The brain uses dissociation to help us perform, survive, and adapt.
The problem isn't the mechanism itself. The problem is when the brain has to deploy it repeatedly, over a long period of time, in response to ongoing threat or overwhelming experience. That's when it shifts from a useful skill to a pattern that starts interfering with daily life.
Dissociation as a Trauma Response
The brain's primary job is survival. Not happiness, not clarity, not even connection. Survival first. And when it's faced with something overwhelming , something that can't be fought, fled from, or resolved , it does what it was built to do. It protects you by dividing your experience.
This is why so many trauma survivors have incomplete memories. It's not repression in the old Freudian sense. Brain scan research shows that the brain doesn't form clear event memories of traumatic experiences the way it does with ordinary ones. The left hemisphere, which is more verbal and more positive, reports the facts it has. The right hemisphere, the feeling brain, holds something else entirely. The result is people who genuinely believe they had a fine childhood, and also can't remember most of it.
Neither version is lying. They're just working from different parts of what the brain held onto.
Dissociation Isn't Just for People with DID
This is probably the most important thing to understand, and also the most underexplained.
Dr. Fisher draws on the structural dissociation model developed by Otto van der Hart and colleagues, which describes the brain as fundamentally fragmented — not as a flaw, but as a feature. The brain uses that fragmentation to help us survive. Which means it's not only people with a DID diagnosis who have parts. It's every trauma survivor.
The difference between DID and other trauma presentations is a matter of degree, not kind. In DID specifically, parts can take control of the body and operate completely outside of the person's awareness , which is what produces lost time. But the underlying mechanism, the fact that trauma creates distinct internal states that respond to the world differently, is present across the full spectrum of complex trauma, CPTSD, and what gets diagnosed as borderline personality disorder or OSDD.
Most people, when they hear this framing, recognize themselves immediately.
Signs You Might Be Experiencing Dissociation
Dissociation doesn't always look like what you see in movies. It can be subtle enough to write off as stress, distraction, or just "the way I am." Some things to notice:
Gaps in your childhood you can't account for
Feeling like different versions of yourself take over in different situations
Periods of lost time you can't explain
Feeling detached from your body or like you're watching yourself from outside
Emotional reactions that feel disproportionate and then leave you confused or ashamed
A sense that your feelings don't quite belong to the same person
Difficulty connecting with emotions even when you know something matters to you
None of these things mean something is fundamentally wrong with you. They mean your brain found a way to manage what it was given.
Understanding Trauma Parts: What They Are and What They're Doing
The structural dissociation model doesn't think about parts as holding memories that need to be downloaded. It thinks about parts as still anticipating danger. They're not living in the past. They're responding to what they learned the past meant about what's coming.
Dr. Fisher describes the main parts this way:
The Apparently Normal Part (ANP)
This is the left-brain, fact-based, verbal part that carries on with daily life. Goes to work, makes decisions, interacts with people. This part often genuinely believes things are fine, or at least manageable. It's not in denial. It just doesn't have access to what the other parts are holding.
The Emotional Part (EP) and Its Sub-Parts
The emotional parts are driven by survival responses. They're not trying to make your life hard. They're doing what they were shaped to do.
The fight part responds to anything that feels like threat with anger and mistrust. It's in charge of hypervigilance, what Dr. Fisher calls "post-traumatic paranoia" — the waiting for the other shoe to drop, the suspicion that betrayal is coming. When something hurts the more vulnerable parts, the fight part shows up defending.
The flight part runs. In adults, this often doesn't look like running. It looks like substance use, disordered eating, workaholism, compulsive busyness — any way the body has found to get away from what it can't tolerate staying with.
The submit part learned that going along, making yourself small, making other people comfortable was how you survived. It carries depression, shame, people pleasing, caretaking, and the tendency to blame yourself for things that were never your fault. Unlike the fight part, the submit part absolutely would blame itself for abuse. The fight part would never.
The attached part (sometimes called the cry for help part) is the part still reaching for what wasn't there. These parts are organized around attachment — around the early understanding that if someone loves you, you're protected. If no one loves you, you're in danger. They want to be special. They're acutely sensitive to rejection and abandonment. And they often pull for caregiving from anyone nearby, including therapists, in ways that can feel overwhelming to everyone involved, including the person doing it.
How the Fight and Attached Parts Cycle
One of the most recognizable patterns in people with complex trauma is the way the attached and fight parts tend to cycle together. Something hurts the attached part — a small slight, a perceived withdrawal of care, a tone of voice. The attached part gets distressed. And then the fight part comes out swinging to protect it.
Then what? The anger of the fight part frightens or pushes away the very person the attached part was reaching for. The attached part panics and clings harder. The fight part escalates. It's a loop that makes complete sense from the inside and looks chaotic from the outside, which then generates the shame that makes everything worse.
Why "I Had a Good Childhood" and Trauma Can Both Be True
This comes up constantly in trauma work. People arrive describing a difficult present and a vague or positive past. And from the outside, it can feel confusing. But from inside the structural dissociation model, it makes complete sense.
The left brain is more positive than the right. It reports the facts it has access to. And in many cases, the left brain genuinely does not have access to what the right brain experienced and stored. It's not lying. It's working from incomplete information.
What Dr. Fisher describes in clinical practice is joining the client in their version of events rather than challenging it. When you don't push, when you don't insist their experience was worse than they remember, something interesting happens. More usually emerges on its own. The system starts to reveal itself when it feels safe enough to do so.
What Helps: The Basics of Trauma-Informed Parts Work
Dr. Fisher's model, Trauma-Informed Stabilization Treatment (TIST), draws from internal family systems, somatic therapy, clinical hypnosis, mindfulness, and some CBT approaches. The core of it is actually quite simple, even if it takes time to practice.
Start with Curiosity, Not Correction
The invitation is to get curious about how you survived, not to analyze what happened to you. The details of traumatic events aren't what we're suffering from now. We're suffering from the effects of those events — the parts that are still anticipating danger, still running the survival strategies that kept us alive then.
Asking yourself "how did I survive?" tends to shift the relationship to your own internal experience. You start to see the parts not as problems but as a team that did the best it could with what it had.
Mindfulness of Parts, Not Merger with Them
The goal of TIST isn't to get rid of parts. It's to help people notice the interplay of parts without being taken over by them. When the attached part is activated and distressed, the work isn't to argue with the feeling or explain it away. It's to notice: "my attached part is very upset right now."
That one step, creating even a sliver of space between you and the part's experience , is what makes the difference. It's not traditional meditation. It's what Dr. Fisher calls everyday mindfulness: noticing moment to moment what's happening in your environment and what thoughts, feelings, and body sensations you're having in response.
Most of us were taught to react to what we think and feel. This is the practice of noticing it first.
On Safety (And Why the Word Often Doesn't Help)
Trauma therapy talks a lot about finding safety. And if you've never experienced safety in a reliable way, that instruction is essentially meaningless. Dr. Fisher is blunt about this: asking people who've never known safety to have it as a goal is like selling refrigerators to Eskimos.
What helps more is working toward less reactivity. Fewer crises. More moments of being able to observe what's happening inside without it taking over completely. That's a workable goal. "Safety" as an abstract concept often isn't.
One Message for Anyone Who Struggles with Dissociation
I asked Dr. Fisher what she'd want people who recognize themselves in all of this to actually hear.
Her answer:
Be curious about how you survived. Be interested in it. The parts that feel disruptive, the ones that take over, the ones that show up with anger or clinginess or numbness ,they were your survival team. They adapted to something that needed adapting to. Very few trauma survivors feel like "it's over and I survived." But it is. And you did.
The work isn't about what happened. It's about what the parts learned from what happened, and what they're still doing to protect you today. Getting curious about that, instead of fighting it, is usually where something starts to shift.
FAQ: Dissociation, Parts Work, and Complex Trauma
What is dissociation, exactly?
Dissociation is the brain's ability to divide attention and compartmentalize experience. It's a built-in mental capacity, not a disorder. In the context of trauma, the brain uses dissociation to help a person survive overwhelming experiences by separating out aspects of those experiences, emotions, memories, sensory information, that would be too much to process all at once.
Is dissociation the same as having DID?
No. DID is one point on a spectrum. What makes DID distinct is that parts can take full control of the body and operate completely outside of the person's awareness, producing lost time. But the underlying mechanism, the brain creating distinct internal parts in response to trauma, is present across all complex trauma presentations, not just DID. Most trauma survivors have some degree of internal fragmentation without meeting criteria for DID.
Can you have dissociation without realizing it?
Yes. Dissociation is often subtle. It can look like emotional numbness, difficulty remembering childhood, feeling like different versions of yourself in different situations, reactions that feel disproportionate, or a chronic sense of unreality. Many people who experience it don't identify it as dissociation because it feels like just "the way I am."
What does "parts work" mean in trauma therapy?
Parts work is a way of understanding and working with the different internal states that develop in response to trauma. Rather than seeing your different reactions and impulses as contradictory or broken, parts work helps you understand them as distinct adaptations, each one shaped by a survival need. Approaches like IFS (Internal Family Systems) and TIST (Trauma-Informed Stabilization Treatment) are both examples of parts-based trauma therapy.
Why do I feel like I had a normal childhood but still struggle with trauma symptoms?
The left hemisphere of the brain, which is more verbal and more positive, often reports a version of events that's different from what the right, emotional hemisphere experienced and stored. This is why people can genuinely believe their childhood was fine while still carrying trauma responses in the body. Both things can be true simultaneously. The brain doesn't form clear memories of traumatic events the way it does ordinary ones, which means memory gaps aren't necessarily a sign of repression, they can be the natural result of how trauma is processed neurologically.
How do I know if I need therapy for dissociation?
If dissociative experiences are interfering with your daily life, your relationships, your ability to work, your sense of self — that's a signal to seek support from a trauma-informed therapist. Look specifically for someone trained in somatic approaches, EMDR, IFS, or structural dissociation models. General talk therapy without a trauma frame often isn't sufficient for complex dissociative presentations.
To hear the full conversation with Dr. Janina Fisher, listen to this episode of The Complex Trauma Podcast.
Learn more about Dr. Fisher's work at janinafisher.com. Sarah Herstich is a licensed clinical social worker and somatic EMDR therapist specializing in complex trauma. Learn more at sarahherstichlcsw.com.
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