Here's another link explaining them...guess I'm going to keep you reading...

http://www.medicinenet.com/thyroid_b...ts/article.htm

in all honesty, though, I would check the
http://thyroid.about.com/
it covers just about everything about thyroid conditions. there are medical professionals that contribute to the articles.
Again, it's plain and direct information...something I needed and in no way do I imply that you need it. My brain fog was fairly bad at one point, and the information was presented in easy to understand terms.
There is good support there; different forums for various thyroid disorders.

Being a (retired) nurse was of no help to me when it came to my thyroid condition....I was nearly comatose from the depression. Only when I was stabilized on my dose was I able to do my research, etc..


it sounds like a lot, but once you read a bit it will fall into place for you...