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. Author manuscript; available in PMC: 2015 Mar 5.
Published in final edited form as: Trends Cogn Sci. 2009 Dec 11;14(1):31–39. doi: 10.1016/j.tics.2009.11.004

Figure 3.

Figure 3

Structured variability induced by task-dependent feedback gains. (a) Correlations of horizontal endpoint position of the left (x) and right (y) hands are found in the one-cursor task (red line and dots) but not in the two-cursor task (blue line and dots). In the one-cursor task, variability along the task-redundant dimension (distance between hands, left up–right down diagonal) is not corrected. (b) The negative correlation develops during the movement, indicating that it arises from a feedback control law rather than from correlations in the initial motor commands [32].