Magnetic fields generated by microscopic devices implanted into the brain may be able to modulate brain-cell activity and reduce symptoms of several neurological disorders. Micromagnetic stimulation appears to generate the kind of neural activity currently elicited with electrical impulses for deep brain stimulation (DBS) -- a therapy that can reduce symptoms of Parkinson’s disease, other movement disorders, multiple sclerosis and chronic pain -- and should avoid several common problems associated with DBS, report Massachusetts General Hospital investigators