Figure 2.

Acceleration traces during the single-hand (unilateral) and two-hand (bilateral) motor tasks using the webcam. Representative segment of the kinematic signal reconstructed during unilateral (upper) and bilateral (bottom) motor tasks from finger tapping, hand movement, and pronation/supination movements of the hand in a patient with Parkinson's disease (PD). Note the general worse performance in the dual tasks shown in the lower part of the image when compared with the corresponding task perform with just one hand.