Fig. 4
From: Reference in-vitro dataset for inertial-sensor-to-bone alignment applied to the tibiofemoral joint
Six flexion and extending movement paths for different configurations of measurement protocol variables. To illustrate the natural coupling pattern between secondary rotations (in black: internal (int)/external (ext) rotation, in dashed gray: abduction (abd)/adduction (add)) and tibiofemoral flexion: (1) fast movement in a vertical movement plane, (2) slow movement in a vertical movement plane, (3) fast movement in a horizontal movement plane, (4) slow movement in a horizontal movement plane, (5) fast movement in a mixed movement plane, (6) slow movement in a mixed movement plane.
