Do you exercise on a regular basis? I think I've learnt from Coursera's Learning How to Learn that interaction with people and exercise have similar effect to our brain cells, that both will help generate new cells (I don't know the details, but you probably get the idea).

So that's what I figure how to keep myself sane if I would enter a period of almost-to-none daily interaction with people.

The one probably can't replace the other, but I'm curious if you would still have those symptoms with regular exercise.