Understanding Structural Dissociation: A Practical Framework for Complex Trauma

Everything humans do is geared toward survival. I think that's the starting point for understanding structural dissociation.

When something happens that's simply too much, the person still has to survive. A child who's being abused still has to get up the next morning, go to school, sit in class, come home, and somehow keep living their life.

So we can think of one part of the personality becoming organised around everyday living. That part keeps going. It does what needs to be done to get through the day.

At the same time, there can be one or more parts that continue to hold the traumatic experience. Those parts hold the traumatic memories, the fear, the shame, and the action systems for psychological defence. They don't know the trauma is over. They're still living in trauma time.

The important point is that this isn't random. It's organised around survival. One part is trying to get through everyday life. Other parts are still organised around the defensive action systems that were necessary when the trauma occurred.

So when something in the present acts as a reminder, the parts holding the traumatic experience can come more forward. The person isn't just remembering what happened. They're re-experiencing it. And the part of the personality that knows the trauma is over becomes less available in that moment.

When you start looking at structural dissociation this way, many of the symptoms begin to make sense. Rather than asking, "Why is this client reacting like this?" we begin asking, "What part of the personality is present right now, and what is it trying to help the person survive?"

The theory gives us a framework for understanding what we see clinically.

The theory itself goes back to the work of Pierre Janet, and more recently was developed by Onno van der Hart, Ellert Nijenhuis, and Kathy Steele. It provides a way of understanding what can happen when trauma is severe, repeated, and occurs early in life.

We can think of the personality as a system. Following repeated childhood trauma, there may be one or more parts engaged in everyday living and one or more parts that continue to hold and re-experience the traumatic events, not knowing that they're over. The part engaged in everyday living is called the apparently normal part, or ANP. The parts that continue to hold and re-experience the trauma are called emotional parts, or EPs. Each part has its own first-person perspective, its own sense of “I." The division isn't random. It reflects the way the personality becomes organised around survival, with some parts engaged in everyday living and others organised around psychological defence.

That helps explain something clinicians see every day. One part of the personality knows the trauma is over, while another continues to respond as though it's still happening. Rather than seeing those experiences as contradictory or irrational, the theory helps us understand them as organised around survival. It gives us a framework for making sense of the client's internal experience and understanding why they can seem so different from one moment to the next.

Most clients don't come in saying they have different parts of themselves. They come because they're struggling with fear, shame, anxiety, or relationship difficulties, and they don't understand why. They think there's something wrong with them. They feel defective, inadequate, or unlovable, but they don't yet understand these as trauma responses.

When they're triggered, an emotional part of the personality can come more forward. The client may begin re-experiencing the thoughts, feelings, sensations, and state of mind they had at the time of the trauma, as though it's happening again. In those moments, the part of the personality that knows the trauma is over can become less available. Clinically, this may present as intense fear, shame, anxiety, or hyperarousal, or as shutting down, feeling numb, disconnected, or not fully present.

Clients often describe these experiences in a particular kind of language. They might say, "It's like I get hijacked," "I just found myself doing it," or "I was watching myself." Afterwards, they may describe things as feeling hazy or difficult to remember. Those kinds of descriptions can be important clues that an emotional part has come more forward.

As therapists, we may notice changes in facial expression, posture, tone of voice, or attention. A client may suddenly look frightened, become very quiet, or seem to drift somewhere else for a moment. Rather than seeing these reactions as confusing or irrational, I think it's important to create what I often call a no-shame zone. These are survival responses. Helping clients understand what's going on from that perspective is often where treatment begins.

Treatment can be organised to a large degree around dealing with the phobia of inner experience. The part of the personality engaged in everyday living has become phobic of the traumatic memories and of the thoughts, emotions, sensations, shame, and fear connected to them because approaching them feels as though it would interfere with everyday functioning. That avoidance is what maintains the dissociation.

At the same time, the emotional parts continue to re-experience the trauma, not knowing it's over. When something in the present acts as a reminder, those parts can intrude into everyday life. So much of the work involves helping clients gradually overcome the phobia of their own inner experience, rather than moving straight into memory reprocessing.

If emotional parts are still living in trauma time, they can become overwhelmed when traumatic memories are approached too quickly. So before memory reprocessing, we help the client develop stabilisation and regulation skills, foster cooperation and collaboration among the different parts of the personality, and strengthen the client's ability to remain present with their inner experience. As the phobia of inner experience begins to lessen, the system becomes more able to approach traumatic memories safely.

I realize there are a lot of different terms that get used, including self states, ego states, and emotional parts. The important distinction is that when I'm talking about emotional parts, I'm talking about a separate sense of self.

We all have self states. We all experience an organised pattern of thinking, feeling and behaving. But there isn't necessarily a separate sense of self attached to them. If I get angry and say something out of anger, I know it's me who did it. I remember doing it. I said what I said because I was angry, and I can own that and apologize for it if I need to. If I get scared, I know it's me who's scared. I'm aware of it as it's happening.

Structural dissociation is something different. There may be one or more parts engaged in everyday living and one or more emotional parts holding and re-experiencing the trauma, with each part having its own first-person perspective. So when an emotional part comes more forward, it's not simply, "I got scared." It's more like, "I got hijacked." "I found myself doing it." "I was watching myself doing it." There's a separation there that isn't present in an ordinary emotional shift.

So we can say we all have ego states, but not all ego states are emotional parts. Not every client who talks about "parts" has dissociative parts in this sense. If structural dissociation involves a division of the personality, with different parts having their own first-person perspective, treatment needs to take that into account. We work with the different parts, or the person as a whole, rather than treating it as an ordinary emotional reaction.

The first thing is that all parts have an important survival function. We don't want to get rid of parts. We don't want to force them together. All parts are welcome. We want to make room for them and understand the important survival job each part has been trying to do.

An angry part may be protecting a more vulnerable part. A critical part may be trying to prevent rejection. A part that shuts down may be protecting the person from something that still feels overwhelming. The job is important, even if the way that part is trying to do its job is creating problems today.

Our goal is to develop cooperation and collaboration among the different parts, with the part engaged in everyday living taking leadership. We're helping the personality system move from an inner war among parts toward cooperation and collaboration. We go at the client's pace. We become curious about the personality system rather than trying to change it too quickly.

The therapeutic relationship is one of our greatest resources because we model curiosity, compassion, and respect for every part of the personality. Over time, we also help the part engaged in everyday living develop that same compassion toward the emotional parts. As that happens, the different parts of the personality can begin working together instead of remaining divided by fear and avoidance.

Integration doesn't mean getting rid of parts. All parts are important. The goal is for the different parts of the personality to begin working together rather than remaining divided.

Integration is an adaptive process that occurs throughout treatment. It begins long before trauma memories are reprocessed, as clients gradually develop the capacity to remain present with their inner experience and different parts begin working together. Pierre Janet described integration as involving two broad processes: synthesis and realization.

Synthesis is when the different parts of the personality begin sharing their experiences and perspectives with one another. As thoughts, emotions, sensations, memories, and different senses of self are shared, they gradually come together into a more cohesive whole.

Realization involves both personification and presentification. Personification is recognising, "It happened. It happened to me." Presentification is recognising, "It's over." The person can remember the traumatic experience while remaining grounded in the present, rather than reliving it.

Over time, as people begin to recognise what happened, they also begin to recognise what they lost. They may grieve the childhood they didn't have, or recognise the impact their ways of coping have had on themselves and the people around them. That grief is an important part of the work. As people integrate what happened, they become increasingly able to engage in everyday life in new ways while remaining grounded in the present.