What happens when you attach several electrodes to your forehead, connect them via wires to a nine-volt battery and resistor, ramp up the current and send an electrical charge directly into your brain? Most people would be content just to guess, but last summer a 33-year-old from Alabama named Anthony Lee decided to find out. “Here we go… oooahh, that stings a little!” he says, in one of the YouTube videos recording his exploits. “Whoa. That hurts… Ow!”
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