Adam Bieber:
I say emotional because it is mainly a lagging sadness and aversion to my believed responsibilities.
This won't cure you, but try taking some 5-HTP. Some of the times I've done it for a few days, I've noticed a remarkably dramatic effect. It seems to make it easier for these self-perpetuating loops to stop - so if you want them to keep going, you can harbor them, but if you don't, it gives more opportunity to do something about them.
As Jon T said: Another thing that helped was acceptance: "be OK with things happening that 'i' don't like". By that, I don't mean only doing the work (accept that I have to do the work), but the aversion itself (accept that aversion to work will arise). Given that you know it's gonna happen, be ok with it.. what happens then?
Also I don't know if this is true for you, but, while I'd have aversion to doing 'work', I notice that when I'm actually in the middle of doing it there's no problem at all. Only when something comes in and causes me to reflectively + emotionally consider that I'm doing 'work', will the aversion arise.