Anatomically accurate model of EMG during index finger flexion and abduction derived from diffusion tensor imaging
Fig 5
Experimentally recorded and simulated electrophysiological signals for the same subject.
(a) Representative spike-triggered averaged motor unit action potentials for two bipolar channels decomposed by the EMG system. (b) Representative simulated motor unit action potentials from two bipolar channels. (c) Sample experimentally recorded electromyogram. (d) Sample simulated electromyogram. Experimental (blue) and simulated (red) EMG RMS voltages (e) and median frequencies (f). The dotted red box in (e) corresponds to the amplitudes of the simulated EMG signals when the population of recruited motor units was reduced to 50% (i.e., 45 motor units) of that considered in the other simulations (solid red boxes– 90 motor units).