THURSDAY, June 22 (HealthDay News) -- A magnetic device that seems to help depression and seizures may also short-circuit migraine headaches in their earliest stages, a new study finds. The transcranial magnetic stimulation (TMS) device, about the size of a hair dryer, was able to interrupt the development of migraines, according to data to be presented Thursday at the American Headache Society's annual meeting, in Los Angeles. The study was funded by the device's maker, NeuraLieve, of Sunnyvale, Calif. About 28 million Americans suffer migraine headaches and about 20 percent experience migraine with aura, characterized by changes in vision before...