On 2/18/14 6:46 PM, David Thomson wrote:
I thought high frequency, high potential currents traveled near the surface of the skin.
skin depth in human tissue at 100kHz is meters. conductivity is about 1 S/m, epsilonr is about 40-50.
I use a tens machine and the low voltage goes through the muscles and bones and then it does cause spasms in the muscles. If Tesla currents are causing pain in joints, it more likely relates to a change of ions in tissues, which are displaced by the E fields.
the studies I've seen attribute the pain to thermal heating. in a bony joint (wrist) the current density is higher, so the Joules/gram is higher.
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