PROGRESS: Brain Pacemaker Tested On Alzheimer’s Patients. “Deep-brain stimulation is already used to treat patients with Parkinson’s, epilepsy, and obsessive-compulsive disorder, and researchers are exploring its use in other conditions, including obesity. In each case, electrodes are inserted into different regions of the brain depending on the intended therapy. In the Alzheimer’s trial, the device is placed into a region of the brain involved in learning and memory.”