Biomechanic and Energetic Effects of a Quasi-Passive Artificial Gastrocnemius on Transtibial Amputee Gait

Figure 7

Affected-side hip flexion moment components with the AG shown for the Baseline condition where the clutch was disabled (thick solid blue line) and the Active condition (thin solid red line). Shaded regions for these curves indicate 1 standard deviation. For reference, biological hip moment data are also shown for the nonamputee from which the clutch spring was tuned (thick black dashed line) 1 standard deviation (black dotted lines). The vertical lines indicate the typical engagement and disengagement times for the clutch.