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. Author manuscript; available in PMC: 2008 Nov 23.
Published in final edited form as: J Neurophysiol. 2006 Nov 22;97(2):1786–1798. doi: 10.1152/jn.00150.2006

FIG. 1.

FIG. 1

A: X, Y, and Z components of the hand velocity generated during a series of hand movements. B: simulated spike discharge conforming to a known preferred direction (PD) (0.0, −0.92, 0.37) and the trajectory in A. C: cross-correlations between discharge rate (B) and each component of hand velocity (A), where the 0- to 150-ms time lags are indicated by the gray boxes. D: vectors representing original PD and 2 estimates, PD^1 (regression over target direction) and PD^2 (cross correlations). This projection preserves the size of the 3-dimensional (3D) angular error for both estimates.