Professional violinist Roger Frisch of the Minnesota Orchestra found himself in a difficult situation, when mild tremors prevented him from continuing to pursue his passion and doing his job. Professionals at the Mayo Clinic determined that he needed brain surgery to identify and fix what was wrong. However, his tremors were so mild that it would have been very risky to perform this surgery without any external brain stimulation. 

Engineers and surgeons at the Mayo Clinic worked together to develop a violin that Frisch could play during surgery, allowing them to properly perform deep brain stimulation, which involves inserting electrodes into the thalamus that send out signals to restore proper brain functionality. An accelerometer on the violin allowed the medical team to detect any tremors that occurred and operate accordingly.

Fortunately, the operation was a success! See for yourself:

[Via IFLScience]