Figures & data
FIGURE 1. Task design. (A) Muscle pairs controlled the cursor along axes diagonal to screen axis. The cursor (the black circle) is at 120 ms from movement onset (corresponding to the distance index). (B) Control signals (darker traces) were computed at 75 Hz by rectifying and smoothing the preceding 500 ms of electromyogram signal (EMG; lighter traces) to determine the instantaneous position of the myoelectric cursor. (C) Experimental design, showing sequence of left hand testing blocks interspersed with right hand training and video presentation.
FIGURE 2. Performance using score and distance indexes. (A and B, top) Bar graph indicates performance of the left hand (LH) before and after right hand (RH) training; line graph indicates RH performance across the four training subblocks averaged across all target positions. (A and B, bottom) Bar graph indicates averaged performance of the LH before and after the subjects watched a video. Error bars represent standard error. *p <0.05.
FIGURE 3. Intermanual transfer and rate of learning analysis. Intermanual transfer was greater in the older group for distance despite their comparable rate of learning. Error bars represent standard error. *p <0.05.
