Radical Weight Loss Surgery

To reach the area of the brain that controls hunger, neurosurgeons insert electric probes about 4 inches into Carol's brain. "If you put a probe in there and put electricity through it, you can stimulate that part of the brain so you no longer get hungry," Dr. Oz says.

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]."