Applying an electric current to the wrist can lessen the frequency of tics associated with Tourette’s syndrome, because it stimulates brainwaves that keep us motionless
Source:
https://www.newscientist.com/article/2245275-electric-current-helps-dampen-tics-in-people-with-tourettes-syndrome/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home