It impaired my cognition just a bit, but that "just a bit" totally stunned me. I normally am a very good speller - meaning, if you wake me up at 3AM and ask me to spell anything, I would. So even though I was advised that I could develop difficulties with spelling, I could not picture, in my mind, how I personally could develop such difficulties.

And then I logged on this forum and could not remember how to spell Moose' userid. The word was in my mind but I could not remember how to spell it. It was an eery feeling and I find it hard to describe, but I did forget how to spell Moose. (it is not that I forgot the 72 in Moose' userid, which would have been understandable - I could not spell the word "Moose" itself).

Confused, thanks for suggesting a thyroid check. I will ask for that.