Deep Brain Stimulation (DBS) is a surgical procedure targets the subthalamic nucleus, which is located below the thalamus. The procedure involves implanting a thin electrode into the brain. The electrode is connected via a wire running beneath the skin to a stimulator and battery pack in the patient's chest (similar to a cardiac pacemaker). Small electrical pulses from the device stimulate the brain and block brain signals that cause Parkinson's symptoms. With DBS, the targeted region is inactivated not destroyed. This procedure was FDA approved in January 2002.