In article <kolodzie.2.0009D9FC at uni-duesseldorf.de>, kolodzie at uni-duesseldorf.de (Stefan Kolodzie) writes:
|> Hello,
|>|> while I'm working with EMG, I wondered if someone can tell me, what
|> processes make the EMG, measurable with _surface_ electrodes. Do I measure
|> electric fields originating at the synapse or do I measure ion currents
|> (besides the ion currents from the skin to the electrode material)?
You are measuring the action potentials of motor units.
If you use a fast timebase to measure a small contraction, you should be able
to distinguish individual triphasic (+-+) waves.
-philippe
