Does anybody have fibrofog problems doing simple math? I used to be very good at things like adding up long columns of numbers in my head. But lately, I make mistakes doing the simplest arithmetic, like adding and subtracting, unless I can write it down. I'm hoping this is related to fibrofog, not further damage to my brain from my MS. I had a cognitive test a few months ago that said my IQ and memory ranked in the 98th percentile, but even then, it sure didn't feel that way. And I've definitely been aware of more cognitive problems with arithmetic in the last few weeks. Of course, I haven't been sleeping well; so that might be a factor. If this is related to fibrofog, would getting more Stage 4 (delta) sleep reverse the problem? Or at least stop it from getting worse? If it's MS-related, I guess all I can do is hope that the Avonex I'm taking will stop it from getting worse. --Laura R.M.