Figure 4

Angular displacement trajectories for the trunk flexion/extension (Tr fl/ex), the shoulder flexion/extension (Sh fl/ex), the shoulder abduction/adduction (Sh ab/ad), and the elbow flexion/extension (El fl/ex) in three different arm WS conditions (i.e., C1, C2, and C6). Data is displayed for arm reaching movements to four targets: the north target, T12; the south target, T6; the east target, T3; and the west target, T9. For each plot, the tick lines represent the average (across subjects) angular displacement trajectories.