Interesting theory. I have looked at it from a different angle. My neuro-psych assessment labeled me a schizoid. This a the DSM-IV term for being a loner type. I think this move to being a recluse is a self-preservation/protection mechanism tied to the lack of comfort with the varios stimulations that come with being more 'out there.'

But, the immune response to be protective and restful could also play a part.

My dogs, especially my female, could tell when I was having a poor day. She would have a less ornery behavior and was more interested in being near me.

What we have found that counters this is being in a brain injury support group. Even when I and others I know are having bad days, we make an extra effort to get to support group. Hope you all have found a good mTBI/TBI support group. The ability to support others in worse condition helps them and gives us some perspective.

My best to you all.