eli5 If MRI machines a super powerful magnets, how come they do not disrupt or damage the electrical impulses in our bodies when we are scanned?
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While you may describe our neural impulses as electrical, they are not electrical in the traditional sense. There are no wires. Chains of cells communicate via chain reactions, not by electrons flowing freely down the line.
Voltages build up on long wires. The voltage across individual cells in your body from an MRI machine is tiny, and since those cells don’t pass that voltage along very well (again, they don’t work like wires) no real significant voltages are formed.
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