EARLIER this month, in the journal Annals of Neurology, four neuroscientists published an open letter to practitioners of do-it-yourself brain stimulation. These are people who stimulate their own brains with low levels of electricity, largely for purposes like improved memory or learning ability.
from My Pocket http://www.nytimes.com/2016/07/24/opinion/sunday/zapping-their-brains-at-home.html
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