Treating natural human variation via brain surgery

Carol...agreed to be the second person in the U.S. to undergo “the most radical treatment ever devised for obesity,” a treatment called Deep Brain Stimulation. Basically, surgeons drill into her brain and carefully poke around, sending electric currents into her brain until they identify the part that controls her hunger, feeling of satiation, etc. And then they implant “two brain pacemakers” into her chest that will send those same electric currents to her brain.