The research on brain stimulation is advancing so quickly, and the findings are so puzzling, that a reader might feel tempted to simply pre-order a genius cap from Amazon, to make sense of it all later.
In just the past month, scientists reported enhancing the working memory of older people, using electric current passed through a skullcap, and restoring some cognitive function in a brain-damaged woman, using implanted electrodes. Most recently, the Food and Drug Administration approved a smartphone-size stimulator intended to alleviate attention-deficit problems by delivering electric current through a patch placed on the forehead.
Last year, another group of scientists announced that they, too, had created a brain implant that boosts memory storage. All the while, a do-it-yourself subculture continues to grow, of people who are experimenting with placing electrodes in their skulls or foreheads for brain “tuning.”
Predicting where all these efforts are headed, and how and when they might converge in a grand methodology, is an exercise in rank speculation. Neuro-stimulation covers too many different techniques, for various applications and of varying quality. About the only certainties are the usual ones: that a genius cap won’t arrive anytime soon, and that any brain-zapping gizmo that provides real benefit also is likely to come with risk.
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