Editing Electromyography (section)

=== EMG signal decomposition ===

EMG signals are essentially made up of superimposed motor unit action potentials (MUAPs) from several motor units. For a thorough analysis, the measured EMG signals can be [[Wavelet transform|decomposed]] into their constituent MUAPs. MUAPs from different motor units tend to have different characteristic shapes, while MUAPs recorded by the same electrode from the same motor unit are typically similar. Notably MUAP size and shape depend on where the electrode is located with respect to the fibers and so can appear to be different if the electrode moves position. EMG decomposition is non-trivial, although many methods have been proposed.<ref>{{Cite journal |last=Stashuk |first=Dan |date=June 2001 |title=EMG signal decomposition: how can it be accomplished and used? |url=https://linkinghub.elsevier.com/retrieve/pii/S105064110000050X |journal=Journal of Electromyography and Kinesiology |language=en |volume=11 |issue=3 |pages=151–173 |doi=10.1016/S1050-6411(00)00050-X|pmid=11335147 |url-access=subscription }}</ref>