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Fig. 2 | Journal of NeuroEngineering and Rehabilitation

Fig. 2

From: Effects of a robot‐aided somatosensory training on proprioception and motor function in stroke survivors

Fig. 2

a Study timeline. b Experimental setup of the robot and the virtual ball balancing task. Wrist abduction tilted the virtual table seen in the computer display toward the left, adduction toward the right, as indicated by the maroon arrows. The task was to move the virtual ball rolled into the blue target circle. The two vibration motors attached to the skin arm indicated the respective ball position relative to the target. The distal motor turned on when the ball was on the right side of the target, the proximal motor when the ball was to the left side. Distance from the target was frequency coded (frequency increased with increasing distance to the target. The motor on the non-trained side indicated the ball speed. c Figures of the untrained wrist tracing task. Red circles and arrows indicate the starting point and movement direction for right-handed users

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