My initial internet research brought up these links or sites. Can't recall how/where I found them, but it might start you reading on it. The Sara Lambert article is pretty informative, if maybe a tad outdated I couldn't find info on her, but judging from the link below, she's featured in a book we have, so I'll have to find that and see what credentials she has. Anyway, this is a start:
Incest-related syndromes of adult psychopathology - Google Books Result
books.google.com/books?isbn=0880481609...Richard P. Kluft, American Psychiatric Association.
"The more severe and prolonged the trauma, the more severe the fragmentation."
Richard Kluft
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The dissociative spectrum (Braun, 1988) extends from normal dissociation to poly-fragmented DID.
http://www.fortea.us/english/psiquiatria/spectrum.htm
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Poly-fragmented DID is an extreme form of DID and involves over 100 personality states. This is often the consequence of sadistic and brutal abuse ... over a long time interval.
http://www.urgenttermpapers.com/dissociative.html
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What is polyfragmentation? The term comes from the root poly, meaning many, and fragments. In complex polyfragmenatation, the survivor will have not only alter systems, but hundreds or even thousands of fragments, isolated parts of their mind created to do a job, and do it well and unthinkingly. Often the job is one that would be abhorrent to the main personality or presenting system. The further away from core beliefs, the greater usually the dissociation and fragmentation that must occur. In other words, a LOT of trauma has to happen to make a person do something that they really don't want to do. And the person has to feel very far away from themselves as well when doing it.
http://www.didcoping.com/h70-dissociati ... tion-svali
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Poly-fragmented Multiplicity
By Sara Lambert
The number now required to be considered "extra" in the multiple stakes is 100-plus, and it is known by the more clinical term "poly-fragmented".
http://fromtheinsideout.tripod.com/arti ... ag-mpd.htm
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The Osiris complex: case studies in multiple personality disorder - Google Books Result
books.google.com/books?isbn=0802073581...Colin A. Ross, Colin Ross - 1994 - Psychology - 296 pages
Polyfragmented... is the fragmentation of the psyche into dissociated personality states that mistakenly believe themselves to be separate people. ...
http://books.google.com/books
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Rebuilding Shattered Lives: Treating Complex PTSD and Dissociative ... - Google Books Result
books.google.com/books?isbn=0470768746...James A. Chu - 2011 - Family & Relationships - 366 pages
"Extreme versions of DID occasionally develop in response to particularly horrific ongoing trauma with polyfragmentation encompassing dozens to hundreds of personality states. In general, the complexity of dissociative symptoms appears to be consistent with the severity of early tramatization."