Focal Dystonia can affect guitar players in a number of ways. The videos below show some of the symptoms.
This video of Marco de Biasi was the first I saw of someone with focal dystonia. The symptoms matched my own, and it was also the first time I had a name for my problem.On Marco's website he talks about his journey with FD and his rehabilitation at the Institute de Medicine del Arte
This video posted by Sebastian D. Gauna shows his left hand problems before he rehabilitated himself. He talks about his recovery in other videos and is keen to help others.
Check out these guitarists and their FD stories.