Dr. Doug Scharre, right, gives the thumbs up to Kathleen Sanford during 

Dr. Doug Scharre, right, gives the thumbs up to Kathleen Sanford during deep brain stimulation testing Monday, Dec. 17, 2012, in Columbus, Ohio. Sanford is an Alzheimer's patient that has a deep brain stimulation implant as part of a study at Ohio State University. In small experiments, scientists are implanting pacemaker-like devices deep in the brains of some people with early-stage Alzheimer's in hopes of slowing the disease's damage. The tiny wires send mild jolts of electricity to stimulate the brain.  (AP Photo/Jay LaPrete)
Associated Press
Dr. Doug Scharre, right, gives the thumbs up to Kathleen Sanford during deep brain stimulation testing Monday, Dec. 17, 2012, in Columbus, Ohio. Sanford is an Alzheimer's patient that has a deep brain stimulation implant as part of a study at Ohio State University. In small experiments, scientists are implanting pacemaker-like devices deep in the brains of some people with early-stage Alzheimer's in hopes of slowing the disease's damage. The tiny wires send mild jolts of electricity to stimulate the brain. (AP Photo/Jay LaPrete)
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