Fig. 5
From: Changes in tibialis anterior architecture affect the amplitude of surface electromyograms
The association between changes in TA architecthre and M-waves amplitude. Scatter plots illustrate how the amplitude of M waves detected from TA changes with variations in the muscle pennation angle (a) and width (b). Data obtained for the three ankle joint angles are overlaid. The amplitude of M waves elicited for 50% and 100% stimulation intensitites are respectively represented with white and grey circles. Lines denote the regression lines calculated between M-waves amplitude and TA architecture measures. Pearson correlation coefficients and their P value are shown within the plots