When surgeons install deep brain neurostimulators for essential tremors, Parkinson’s, or other conditions, the patient is kept awake to determine whether the electrode leads are making correct contact. This normally involves the patient performing simple tasks, but when a tremor is slight it’s a challenge to notice it. Normally deep brain stimulation implants are not advised for people with relatively minor tremors, but things are different when the patient is a violinist. At the Mayo Clinic an accelerometer was attached to the bow and the patient, a professional musician, played his instrument while the grace of his movements was analyzed by the computer. This helped surgeons place the electrodes accurately and the patient is back on stage fiddling away. Here’s a video report from Mayo Clinic:

(hat tip: CNET)