The growing trend of "do-it-yourself" transcranial direct current stimulation (tDCS) poses hidden risks to healthy members of the public who seek to use the technique for cognitive enhancement. Researchers from the Perelman School of Medicine at the University of Pennsylvania and Beth Israel Deaconess Medical Center, a Harvard Medical School teaching hospital, along with several members of the (cognitive) neuroscience research community warn about such risks involved in home use of tDCS, the application of electrical current to the brain.

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