Wood said he uses tDCS while playing improvisational jazz piano and the stimulation helps to increase his overall focus while playing.

“The first time I tried it, I immediately noticed an effect,” Wood said. “You get a light that blinks in the corner of your eyes, [which is] just the exciting of the optical nerves, and I also felt a metallic feeling in the back of my mouth.”

via DIY devices jolt brain, improve function – The Columbia Chronicle: Health & Tech.