I have noticed that I feel almost dizzy and very easily distracted after writing for long periods. Less than about five or six hours and I seem okay. Beyond eight to twelve hours, I am a hazard on the roads! I only schedule writing for days I am not going anywhere. The five minute drive, on 35MPH roads, to the grocery store? I seriously feel like I am drunk! It is not just the mild physical disorientation that possibly comes from all the eye movements. I am mentally WRUNG OUT! Focus is gone. Concentration is shot. I'm not even really acting like ADD. It is more like nothing can get through my buzzing fog of mental... popcorn. Like my brain has been replaced with rapidly popping popcorn, viewed through static. Cannot finish a thought or a project. I once cleaned half the kitchen counter and then stopped. Not because I was done or got distracted by something shiny. I just put the sponge and 409 down and forgot I was cleaning! Later, I came back upstairs and could see where I had just stopped, for no reason. "What happened here, stupid?" I said with a gesture and a disappointed head shake. Am I the only one who has this mental fog after long spells of writing? I don't like it!