A cross-section of a normal brain, right, and one of a brain damaged by advanced Alzheimer's disease.
Courtesy of Merck & Co.
Kathleen Sanford performs neurological cognitive tests in Columbus, Ohio. Sanford is an Alzheimer's patient who has a deep brain stimulation implant as part of a study at Ohio State University.
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It has the makings of a science fiction movie: Zap someone's brain with mild jolts of electricity to try to stave off the creeping memory loss of Alzheimer's disease. And it's not easy. Holes are drilled into the patient's skull so tiny wires can be implanted into just the right spot.