Simultaneous decoding of both translational and rotational movement from a population of 512 movement-modulated motor cortical neurons during the center-out with rotation task. All 446  neurons  tuned  to  hand  translation  were  used  to  decode  3D  hand   velocity  using  a  modified population vector algorithm (indirect OLE), and all
<pre>326 neurons tuned to hand rotation were used to decode  1D  hand  rotational  velocity  with  the  population  vector  algorithm.    The translational  and 
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<p>rotational  velocities  were  integrated  to  get  hand  position  and  orientation.    This  figure  shows  the decoding  results  for  eight  movements  with  clock-wise  (CW)  hand  rotation  in  the  frontal  plane. Each decoded movement is shown in a different color illustrating its instant 3D hand trajectory and hand  orientation  in the frontal plane.   Position of the  color dots represents the  instantaneous 3-D hand  position.  Orientation  of  the  small  color vertical  lines  indicates  hand  orientation  in  the  frontal plane  at  four  time  points: start  of  movement,  1/3  into  movement,  2/3  into  movement,  and  end  of movement (length of the small vertical line is arbi
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trary).    At the time points corresponding to start and end of movement, black “+” signs were plotted to indicate the horizontal and vertical directions to facilitate the visualization of hand rotation. Supplemental Figure 6.
Wei Wang, Sherwin S. Chan, Dustin A. Heldman, and Daniel W. Moran
CC BY-SA 3.0
Adapted from the Supplementary material from "Motor Cortical Representation of Hand Translation and Rotation during Reaching" <a rel="nofollow" class="external free" href="http://www.jneurosci.org/content/30/3/958.full">http://www.jneurosci.org/content/30/3/958.full</a>