From the headline, I assumed that the article was about trepanation (alternately trephination or trepanning). People have been peeling back the scalp and drilling holes in their crania for thousands of years to relieve things like recurrent headaches, seizures and mental disorders. It's been basically dismissed as pseudoscience by the medical profession, but there are still some people out there taking matters in to their own hands (try an image search), and there's an international advocacy group to boot.

Was there a control group in the study that received just the hole in the head, or did everyone get larger and smaller doses of current from the electrode implants? Maybe, just maybe, the hole itself was enough.