Scotland to try out a controversial treatment using magnets.Jo Arnold will undergo a form of therapy which involves bursts of magnetic energy being sent into her head.The 42-year-old has been left terrified to drive in case she knocks someone over.Now she hopes transcranial magnetic stimulation (TMS) will help her conquer her obsessive compulsive disorder.Jo said: “It’s the first type of medical treatment outside of therapy that I’ve tried.