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Transcranial magnetic stimulation (TMS) is a noninvasive method to excite neurons in the brain. The excitation is caused by weak electric currents induced in the tissue by rapidly changing magnetic fields (electromagnetic induction). This way, brain activity can be triggered or modulated without the need for surgery or external electrodes. Repetitive transcranial magnetic stimulation is known as rTMS. TMS is a powerful tool in research and diagnosis for mapping out how the brain functions, and has shown promise for noninvasive treatment of a host of disorders, including depression and auditory hallucinations.

Transcranial magnetic stimulation - Wikipedia, the free encyclopedia

And it can be used to treat opinion as well as interest but it's a bit low tech, light is a much better medium. The tv is more real as you think