WASHINGTON – It has the makings of a science fiction movie: Zap someones brain with mild jolts of electricity to try to stave off the creeping memory loss of Alzheimers disease.
And its not easy. Holes are drilled into the patients skull so tiny wires can be implanted into just the right spot.
A dramatic shift is beginning in the disappointing struggle to find something to slow the damage of this epidemic: The first U.S. experiments with brain pacemakers for Alzheimers are getting under way. Scientists are looking beyond drugs to implants in the hunt for much-needed new treatments.
The research is in its infancy. Only a few dozen people with early-stage Alzheimers will be implanted in a handful of hospitals. No one knows whether it might work, and if it does, how long the effects might last.
Kathy Sanford was among the first to sign up. The Ohio womans early-stage Alzheimers was gradually getting worse. She still lived independently, posting reminders to herself, but no longer could work. The usual medicines werent helping.
Then doctors at Ohio State University explained the hope – that constant electrical stimulation of brain circuits involved in memory and thinking might keep those neural networks active for longer, essentially bypassing some of dementias damage.
Sanford decided it was worth a shot.
The reason Im doing it is, its really hard to not be able, sometimes, to remember," Sanford, 57, said from her Lancaster, Ohio, home.
A few months after the five-hour operation, the hair shaved for her brain surgery was growing back and Sanford said she felt good, with an occasional tingling that she attributes to the electrodes. A battery-powered generator near her collarbone powers them, sending the tiny shocks up her neck and into her brain.
Its too soon to know how shell fare; scientists will track her for two years.
This is an ongoing evaluation right now that we are optimistic about, is how Ohio State neurosurgeon Dr. Ali Rezai cautiously puts it.
More than 5 million Americans have Alzheimers or similar dementias, and that number is expected to rise rapidly as the baby boomers age. Todays drugs only temporarily help some symptoms.
Attempts to attack Alzheimers presumed cause, a brain-clogging gunk, so far havent panned out.
Were getting tired of not having other things work, said Ohio State neurologist Dr. Douglas Scharre.
The new approach is called deep brain stimulation, or DBS. While it wont attack Alzheimers root cause either, maybe we can make the brain work better, Scharre said.
Implanting electrodes into the brain isnt new. Between 85,000 and 100,000 people around the world have had DBS to block the tremors of Parkinsons disease and other movement disorders.
Early in the disease, Alzheimers kills only certain spots. But the diseases hallmark gunky plaques act as a roadblock, stopping the on switch so that healthy circuits farther away are deactivated, explained Dr. Andres Lozano, a neurosurgeon at Toronto Western Hospital whose research sparked the interest.