Definitely. Radiation is energy and research findings provide at least some information concerning how specific types may influence biological tissue, including that of the brain. In some cases the effect may be therapeutic. For example, transcranial magnetic stimulation (TMS) is a technique used to induce a short-term interruption of normal activity in a relatively restricted area of the brain by rapidly changing a strong magnetic field near the area of interest. Mark George provided a nice account of TMS in the September 2003 issue of Scientific American. In it he described how head-mounted wire coils can deliver powerful yet evanescent magnetic pulses directly into focal brain regions to painlessly modulate neural activity by inducing minute electric currents. Clinically, TMS may be helpful in alleviating certain symptoms, including those of depression.
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