Fig. 6

Motor coordination during the pick and lift task for eEMG (top) and sEMG (bottom) configurations for S1. The temporal delay between the instants when the grip and load forces reached 50% of the load force at lift-off significantly reduced from 297:160 ms (median: IQR) in the eEMG configuration to 183:118 ms in the sEMG configuration (p < 0.001). Namely, the median delay was reduced by 39% when surface electrodes were used