The sound-limb ankle kinematic patterns were similar to those observed for the control sample aside from some idiosyncratic movement patterns, such as those exhibited by the subject with unilateral Chopart amputation (Figure 6(a)).
In the subjects with Chopart amputation, the affected limbs exhibited a normal knee moment pattern but the magnitude of the knee flexion moment was increased in two of three cases (Figure 8(b)-(c)).
On the affected limbs of the subjects with Chopart amputation, the magnitude of the ankle moment did not increase linearly during the middle of stance phase as in the control subjects but the peak plantar flexion moment was comparable to controls (Figure 9(b)-(c)).
Less than normal power absorption was observed in the subjects with Chopart amputation as well as the subject with TMT amputation during early stance but was comparable to controls in the remainder of the amputee cohort (Figure 11(b)-(c)).
The power generated by the subjects with TMT and Lisfranc amputation was virtually negligible and comparable to that exhibited on the affected limbs of the subjects with Chopart amputation (Figure 12(b)-(c)).
Three distinct movement patterns were observed, and on this basis, the "Discussion" will be presented in discrete sections looking at the gait of (1) the single subject with MTP amputation who used insoles, (2) the subjects with TMT and Lisfranc amputation as a group who wore toe fillers and slipper sockets, and (3) the subjects with Chopart amputation who used clamshell prostheses.