I had the strangest test on my body yesterday. It is a VNG (Videonystagmography. They put some weird goggles on me and have me do various things while they measure the movements of my eyes. It takes about two hours and is quite involved.
It actually stimulated spasms in my joints at various times. That includes my shoulder. legs, hands, and fingers. It was very strange! I had wonky head problems after it was over that I noticed when I got back home.