I did those 5 yesterday. The only one I failed was the one for arthritis, because I have rheumatoid arthritis, and so DUH, of course I failed that. They are basic tests, and rather old ones, but still reliable for things like neurological damage.
There was one test that I failed really badly at, that wasn't listed on your link. It's one in which you take a deep breath, and then breathe out
every single ounce of air out of your lungs and hold it. The longer you can hold it without gasping for air is a positive sign, it means that your
blood is oxygenating properly. Some healthy people can go over 20 seconds before gasping for air. For me, by 10 seconds I'm desperate for air.
Anyway, thanks for sharing. It doesn't hurt to do some "home doctorin'"!