Figure 2
From: Muscle synergy stability and human balance maintenance
VAF. Two examples of VAF. SSI for number of synergies k = 1… 6 are shown. Participant sbj1 (left) has one synergy since his SSI for k≥1 is greater than the 90% threshold (horizontal line), and participant sbj9 (right) has two synergies since his SSI for k≥2 is greater than the threshold. Error bars denote standard deviation.