Watch Dr. Oz explain this experimental weight loss surgery.
After the brain probes are in place, doctors also implant regulating devices, which are similar to pacemakers, into Carol's chest. These monitor the electrical currents that control Carol's food cravings and feelings of satisfaction.
"You turn these on when you're ready to turn it on, after the wounds have healed," Dr. Oz says. "Then, you can begin to stimulate [the brain]."