I am glad for the work of those who developed the Theory of Structural Dissociation and wrote The Haunted Self. If not for their work, I would probably still not know what is wrong with me. They made up the categories of "Apparently Normal Parts" and "Emotional Parts" to describe what they had observed about traumatized people. ANP and EP describe their fixations: either they are haunted by trauma or they are avoiding it.
A lot of people object to the terms because people are more complex than this. But I find the categories useful for understanding our orientation in the world. However, the psychologists who described trauma systems were looking at us from the outside and they described what they saw. I would just like to share some things I have observed about the inner world and its structure.
I see the mind as divided into several layers. Even singletons know a conflict between "heart and mind." There is the conscious mind, the dream mind, the emotional mind and the body mind. There could be sublayers within each layer as well, especially in a DID system. Our existence as humans and also non-human-identified ones who live in human bodies, is a combination of any or all of the minds.
The dream-mind is a bridge between the conscious mind and the emotional and body minds. Some alters exist in the dream mind especially EP. A creative ANP or EP can tap into the dream mind to produce works of art, etc. that also express their feelings. Deep in the dream mind there are also creator alters who can transform or translate information between minds. They create to make their world make sense and to make the pain more bearable. They can create other alters and inner worlds.
I have some knowledge of a body alter or system who can control muscle tension. My systems were created entirely from emotional abuse, I mention it because it seems relevant. The first thing the body alter said to me with words was, "are you sure you want to remember that?" I was in a half-sleep state and so they're connected to the dream mind. They used physical sensations to remind me what it feels like to hate.
The body alter causes muscle tension in my neck, shoulders, etc. which I learned is a common symptom of PTSD. The body alter can create flu-like muscle aches or headaches. They have demonstrated, but they are benign. I imagine they could also produce very painful contractions anywhere in the body if they had the will to do so. But they have hinted at their role as
a dissociative support system in the body. They support hard and rapid switching without headaches, and contain poisonous hate. They aren't just unconscious bodily functions that cause somatic things to happen. They are systems beneath systems.