Hi drccdavis and Welcome to NeuroTalk. Wow, first I must say Skiing at 71!!! woohoo. I'm 52 and could not imagine doing anything that physical anymore. AND~~I might add, 71 is not old; I'm just impressed. Sorry you have had problems due to it though.
Take a look around the forums. This is an amazing place w/alot of great info and friendly members. Just jump in anywhere and join us.
Wish I could be of more help, but just wanted to welcome you.