Fig. 2.

Movement kinematics from a representative participant in the constrained experiment. A, Rotation task. Hand paths (insets) and tangential velocity profiles (aligned at movement onset with tick marksindicating onset of go-cue) for accepted trials with instruction directions of 20° (top) and 80° (bottom). B, Extension task. Hand paths (insets) and velocity profiles for instruction distances of 25.5 mm (top) and 93.5 mm (bottom). The top right inset inA represents the 25 go-cue stimuli positioned relative to the location of the hold-zone. Calibration bars for path length correspond to 50 mm. Calibration bars for velocity profiles correspond to 250 msec (horizontal) and 20 cm/sec (vertical).