Of course you have a brain Cookie. You talk here nearly every day. It’s the other stuff that might be there also . I think like this. I’m 86 and if there is something else there, it’s going to take about 10 years to get really nasty. At 96 I don’t think I’ll care.
30+ years ago I had a vertigo episode. I went through the same tests that you are having. I’ve had 2 attacks since. I now carry Stemetil tablets, ( Dr advice). One tablet usually stops it. I’ve learned to recognise feeling a bit unstable. This for me is the first sign.
Today I’m going out for lunch with Probus. I’m official photographer for the event.