Fig. 5.

a In the case of shoulder abduction for a person with near normal ability; the angle between the shoulder and torso must increase from position 1 through position 4 while the elbow angle is at least 170 degrees. Though the movement is recorded as completed within the Game Log at position 4, position 5 represents the range of motion that the person actually displays when performing the movement; this recorded range of motion is utilized by Recovery Rapids™ to appropriately establish the difficulty level for each patient. b The distance (m) between the hand and shoulder in the x plane is utilized to determine the actual start and end points of the movement for subsequent kinematic analysis. Gesture states (positions) 1–4 are indicated on the plot, the trigger occurs at gesture state 4, illustrated by a black circle. Position 5 reflects the maximum range of motion exerted by the participant