I like the idea of seeing it as physio.
That's good and it's quite a handy way of explaining it to people who care about you (as opposed to justifying yourself to those who don't, again don't bother with them, waste of your time and currently limited energy).
This might help if you like he physio idea.....
I went to a trauma specialist last year (I have ptsd for 15yrs and developed a depersonalization disorder due to lack of appropriate/timely treatment)...anyway, we did this thing called senosri-motor body psycho-therapy (it sounds fancy but it isn't!).
Basically the pain (physical/mental whatever) you feel (I used to use words like blocked, severed, heavy) etc etc...I couldn't talk about the feelings and I couldn't remove the pain so I was at a stale mate.
So I was taught to describe the pain and it's location on me and it's relation to me as a physical object/picture (I studied design and like architecture so I tended to describe hings in those terms,
Me... it's angular and dark blue, cold, solid, made out of stone but wax. It's heavy, it rests on the top of my neck and makes me feel lop sided. It's impenetrable, it won't let me look inside.....
Therapist...Why not? Ask it why not? What function is it perfoming by keeping you out? What do you have to barter to find out what's inside.
Me....(in quite a surprised voice) I can find out as long as the shape doesn't collapse.
Therapist.... Okay what is it made of now?
Me... It's transparent, it's made of a frame like retractable tent poles, it can collapse, the light shines though it, one panel is a door....
Therapist...Oh so you can go in? Whose in there?
Me....It's me! only smaller, she's pushing her arms and legs out to hold the shape up, it's no solid. etc etc
Thought i might help make you feel better and sometimes if you can visualize whats going on inside as something you relate to....well it stops you banging your head against the wall and suddenly you have his tool to progress with. :)