Mark, great answer. Do you have any theories as to why people with multiple injuries don't recover as well each time? My guess would be that more cells die that are not replaceable each time.

I saw that young good neuro again and he explained to me that during my two acquired injuries a cascade of chemicals that are safely stored in brain cells were released causing all kinds of havoc. That's my best interpretation of what he said

As you already know, recovered pretty well from first ABI and TBI, the second ABI not so much.