Effect of Relative Marker Movement on the Calculation of the Foot Torsion Axis Using a Combined Cardan Angle and Helical Axis Approach
Figure 2
Modeling of foot torsion and flexion with dashed lines representing distal segment coordinate system in neutral position and solid lines representing distal segment coordinate system after rotation around dash-dot line: (a) rotation of midfoot relative to rearfoot (torsion) and (b) rotation of forefoot relative to midfoot (flexion).
