Have you considered the possibility that it doesn't have anything to do with any of those things and it might just because you are getting older. I think as we get older we just tend to slow down in general. Perhaps the perceived lack of motivation is just a side effect of something biological. Good thing I am not a doctor right?
No, it isn't because I am getting older. The white hairs are though :)
This is far more acute than aging and it isn't a recent thing, it has been from the day of the stroke.
Doctors haven't helped me much, so you might be just as good!
Ah, okay. I can't even imagine the path you have had to travel since that. I hope you can eventually find some of the answers you are looking for!