Electricity doesn't short circuit in a fixed magnetic field. Still a moving magnetic field induce currents in a conductor. When you move inside the MRI some currents can even do electrolisys in your salty water content. The frequency of the moving magnetic field is at the lower end of the brain frequencies and it doesn't induce any lasting effects being the exposure too short. But yet... Can't say more.. it's still a taboo
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Its still moving an electric charge. A moving charge produces a magnetic field. A magnetic field inside another electric field will either attract, repel or produce torque. A weak electric current in a strong fixed magnetic field will meet resistance. If our brains and nerves are electric, we should instantly go into a coma or go into convulsions and arrhythmia when we near the giant magnets. Yes, I know, it's calcium and sodium, etc, etc. It shouldn't matter, it's still moving a charge.