Figure 1From: The effects of poliomyelitis on motor unit behavior during repetitive muscle actions: a case reportPlotted normalized electromyography amplitude (EMG RMS) (solid line) and mean power frequency (MPF) (dashed line) values for the healthy (HE) (dark line) and polio (PO) (grey line) participants during the 1st, 10th, and 20th repetitive contraction at 50% maximal voluntary contraction. From repetition 1 to 20, HE had an increase in RMS (26.97%) and a decrease in MPF (11.81%) while the PO had relatively no change in RMS (1.71%) or MPF (0%).Back to article page