If medical science hasn't astounded you enough, perhaps the brief story of Roger Frisch will change your mind.
After suffering from a condition called "essential tremor," the Minnesota concertmaster's hopes of maintaining a perfect performance slowly dwindled. His bow arm would shake so much that his playing was seriously hindered.
However, with the advent of new technology called "deep brain stimulation," Frisch received a device invasively inserted into his brain that allows a shockwave to halt his tremor.
The device--get this--can be turned on and off with what looks like a television remote control.