I haven't noticed a decline reading your posts.

But I do know what you mean about a mental decline with bipolar. I know I have definitely experienced one. I was valedictorian in high school, graduated summa cum laude with all A's and one B for a B.S. in microbiology, got an M.S. in cell & molecular biology. Now...I couldn't do even half as well. I used to be able to write stories all the time, and I haven't been able to do that since college. There was a time if I needed to buy 50 items in a grocery store, I could remeber each one without a list, and now, I'm lucky if I can remember a mental list of 3 items. It's really discouraging.