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May 19, 2014 Small jolts of electricity to the brain can treat diseases like epilepsy and Parkinson's. But some healthy people are trying electrical stimulation to make the brain sharper. And it may not be safe.
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Deep brain stimulation eased Shari Finsilver's tremors, but didn't stop them entirely. Here she uses both hands to stabilize a glass of water.
Marvin Shaouni for NPR
April 7, 2014 It's easy to think that a shaking hand could be a sign of Parkinson's disease. But it's more likely essential tremor, an ailment that's not life-threatening but can become debilitating.
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