“The research so far shows that when we use tDCS you can, in some cases, improve performance,” he told this week’s edition of Swipe.

“It depends on several parameters like the type of the current that you deliver, where you put the electrodes on your head and the timing of the stimulation.”

It is thought the technology could also be used to help people with ADHD and potentially treat depression or conditions like Parkinson’s disease.

Dr Kadosh said the research so far showed that tDCS is risk free.

http://news.sky.com/story/1454195/how-electric-currents-could-boost-brain