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.
Howell come to ChatDoctorI really appreciate your concern, if the finger movement being affected by head injury then it is the nerve damage, physiotherapy can be tried and that is the hope you have else it could be irreversible disease, hope this information helps.