Anyway back to the Jason Padgett case. His emotional motivations seem to be changed; prior to the TBI, his motivation was just living in the moment, enjoying physicality for what it is. Afterwards, he started to be deeply motivated by his inner visions and by research. He states in the book several times that research was now his focus. Researching things online all day, 24/7, enjoying it greatly. He later married and his wife did help him go out into life more. But, he had to be helped, meaning he didn't really have the motivation for those Se&7-ish experiences anymore.
The temptation of 5 certainly seems to be true for him: "replacing direct experience with concepts", sitting and thinking all day about concepts seems to qualify IMO. He got the 5 desire of "mastery" too, he went back to school to understand things better. He even started to looked like a really bad stereotype of a 5 after a few years of just sitting at home locking the entire world out. That was also the PTSD stuff of course. What I could see as 7 is his joy in seeing the geometrical things in the world. Though you could say it's the joy of a 5, love of concepts more than the world itself. I don't know. I can be convinced that this somehow can still be 7-ish.
MBTI wise, I'm more certain that his Se really went down the drain.
Btw I see now that the article I linked really IS short
I don't know if there's a better one out there... I guess the stuff I'm telling here does sum up the contents of the book somewhat.
If you are interested in the book, I'm happy to send the ebook. Feel free to PM me.
It's pretty interesting and honestly I wasn't originally thinking about MBTI let alone enneagram when starting on the book, but the things in the book really jumped out at me as... really interesting in the context of typology (beyond simply being very interesting anyway).