tourette limited to one or more alters

Researching 'Tourette' in the context of identity and notably substitute identity formation (in DID alters) I noticed that in some patient tourette only shows in a specific alter, not in others. That doesn't mean the brain damage (the biological substratum of tourette) doesn't affect the other alters, but the tics only happen in that specific alter. Now in the book I am writing we hypothesize that alters (or substitute identities that happen much more widely than just in the extreme DID cases) are caused by traumatizing experiences. Later on they are triggered by circumstances similar or related to the original trauma. This hypothesis of course goes against the notion that tourette and similar disorders are just neurological, but seeing tourette in this perspective points at different ways to deal with it, looking for the traumatic cause rather than symptomatic treatment. Then approaches as now researched for PTSD at Hopkins with MDMA or microdosing might be an option.

I found a few remarks in this forum (back from 2013 like "Certain alters tic like crazy, others don't at all." "I can usually tell who is awake by the type of tics that I have. ") that seems to support the hypothesis, but are there more?

We have a brother with Tourette, but he's a singleton.

MDs