When stuck in a procrastinating loop, I can almost feel the word bounce on my visual cortex. They're just packs of glyphs. Like a full queue, I have to carefully wait for more "room" occur and then swallow a few words, so on and so forth. And after a few runs likes this, all of a sudden my brain starts crunching again and I can run through a paragraph in logic-mode. It activates blood flow in deeper parts of my brain (a recent reduced cardio vascular capacity , "make me feel" where blood is going). It's also very emotionally linked. Whenever something valuable happens to me I don't struggle to get into the nice state.