Fig. 10

Grip load phase trajectory. Grip force vs. load force trajectory for non-amputee and amputee participants for the a heavy object and c light object. Dotted lines represent mean phase trajectory for all successful (no-slip) trials in the first two blocks (trials 1–72). Time has been scaled to object lift-off using a 99 % threshold on the maximum load force, and scaled to object set-down using a 98 % threshold on the maximum force for each trial. Each dot represents a 2.5 % ΔT of the normalized time vector. Shaded regions represent the 95 % confidence interval of the mean. Purple traces represent non-amputee participants. Cyan traces represent amputee participants. Dashed line represents the slip threshold. Hatch lines represent the area inside each trajectory (GripArea). The mean GripArea for non-amputee and amputee participants is shown in the accompanying bar plots for the b Heavy object and d light object. Error bars represent 1 standard error