Electrically stimulating your brain can boost memory – but here's one reason it doesn't always work
- Written by Shelly Fan, Postdoctoral Scholar in Neuroscience, University of California, San Francisco

The first time I heard that shooting electrical currents across your brain can boost learning, I thought it was a joke.
But evidence is mounting. According to a handful of studies, transcranial direct current stimulation (tDCS), the...