From The Harvard Gazette:
To recover from a stroke, it helps to get the two sides of the brain talking to each other again. One way to do this is by waving a magnetic wand over the heads of stroke victims, a Harvard researcher has found. The technique, called transcranial magnetic stimulation (TMS), is painless. Felipe Fregni, a neurologist at Harvard Medical School, has used it to improve the movement skills of people whose brains have been damaged by strokes, skills that include everything from writing to putting on your pants.
Frengi is having some success adjusting the go and no-go signals with magnetic pulses generated in the wand. He and his colleagues at the Harvard Center for Noninvasive Brain Stimulation have “pulsed” 26 patients so far, with encouraging results.