A man who strummed the guitar as surgeons at a Bengaluru hospital operated on his brain showed how the unusual procedure had cured the problem that was hindering his ability to play. Abhishek Prasad, a 37-year-old software engineer, had been suffering a neurological disorder that caused his fingers to cramp in his left hand, preventing him from playing the guitar properly. And so, on July 11, Mr Prasad strummed his guitar as surgeons drilled into his brain for some very delicate surgery. He was fully conscious throughout the procedure.