Can anyone tell me what gives the continuous tingling effect when you hold a battery to your tongue?
You would think, being DC, there would not be any sense of pulsation. But that is what you get.
Dave King
- posted
13 years ago
Why battery tingles if DC
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- posted
13 years ago
Is it more "sizzling" electrolysis that is felt/tasted?
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- posted
13 years ago
Nerve signals are pulses.
Cheers! Rich
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- posted
13 years ago
The transmembrane potential of neurons is not much - perhaps 60mV or so. Depolarizing these cells by passing currents is a big part of how they work. Neurons have a fairly broad frequency response generally tapering off at frequencies much higher than DC (being relatively sensitive around 60Hz, for example ;), but you're giving them a big kick with your 9V battery. And there are a _lot_ of neurons at/near the surface of the tongue!
-f