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Fig. 7 | Journal of NeuroEngineering and Rehabilitation

Fig. 7

From: Restoration of motor control and proprioceptive and cutaneous sensation in humans with prior upper-limb amputation via multiple Utah Slanted Electrode Arrays (USEAs) implanted in residual peripheral arm nerves

Fig. 7

S4 tracked the position of three different moving virtual targets with the thumb, index, and middle fingers of a virtual prosthetic hand and then tracked the combined movement of all three targets with at least the middle finger and index finger. The top three traces depict the target location (solid line) and the subject-controlled, decoded virtual finger location (dashed line) for the thumb, index, and middle fingers. The subject independently tracked single thumb, index, and middle finger targets (depicted from left to right, respectively), and simultaneously tracked at least the middle and index finger targets in combination even though training data included no combination movements. The lower portion of the figure shows a raster indicating the times of recorded spike events from 8 selected median or ulnar nerve USEA electrodes during this task. The firing rates of spike events on these electrodes are uniquely tuned to different movements. To see this figure in color, go online

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