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. 2015 Jul 17;10(7):e0132983. doi: 10.1371/journal.pone.0132983

Fig 1. Experimental tasks.

Fig 1

(A) Arrangement of targets and required movement of a cursor for the step-tracking task. The target was displayed as an open circle with an internal diameter of 4.5° of wrist movement. The cursor was a black point (ϕ = 0.9°) that moved in proportion to the subject's wrist movements. The position of the cursor in the center target corresponded to the center of the screen, and the cursor moved left for flexion movements, right for extension movements, up for radial deviation, and down for ulnar deviations of the wrist. The subjects were required to move the cursor from the center target to the new target as rapidly and accurately as possible. UP, up; UR, up and right; RT, right; DR, down and right; DN, down; DL, down and left; LF, left; UL, up and left; Rad, radial deviation; Ext, extension; Uln, ulnar deviation; Flx, flexion. (B) The pursuit wrist task. The subject was instructed to maintain the position of the cursor within the target moving along the path of Fig 2 at a constant speed (6.2°/s).