That's what the Fibromyalgia Take Charge book, published by the Arthritis Foundation, says. It states that fibromyalgia can cause loss of oxygen to parts of the brain, which explains the fog and memory lapses. Sometimes, especially when I'm having a CFS flare, it feels as if I cannot remember a thing for a few seconds, like my mind blanks out. I was really getting worried, due to running red lights, and going to the wrong apartment (in a different building). Then I read that in the book, so I at least know what is happening. For those that this is old news to, I apologize. But it was rather shocking to me. I had never thought of it that way.