i m a guitarist of 18 years, and pianist. I had a head trauma, and lack of oxygen to the brain. when i started playing guitar again, my left hand, in the ulnar fingers, has basically lost most motor functions in the ring finger. OT hardly helped, muscle relaxers or Benzodiazapam (klonopin) temporary relieves about 80% of discomfort. I believe its Focal Dystonia. Ulnar Nerve Palsy has been ruled out.