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. Author manuscript; available in PMC: 2006 May 2.

Published in final edited form as: Exp Brain Res. 2005 Nov 16;169(4):496–506. doi: 10.1007/s00221-005-0163-2

Figure 3. — Forces that subjects produced in the channel trials for movements to target at 0°. (a) Forces ${\hat{f}}_{a}$ (Eq. 3) produced by a typical subject in the first and last channel trials plotted as a function of hand position between start and end of the movement. (b) Across subject averaged forces for the first and last channel trials. (c) Comparison of forces ${\hat{f}}_{a}$ produced in the channel trials and forces required for compensation of the field, f_a (Eq. 1). The black trace is ${\hat{f}}_{a}$ produced by a typical subject as a function of movement displacement in the first and last channel trials. The grey trace is f_a . (d) Averaged ${\hat{f}}_{a}$ and f_a across six subjects.