Figure 6.

Kinematic trajectories of successful RTGs. A, Example of RtG movement tracked for reconstruction and kinematic analysis. In this stereotypical RtG sequence, the yellow line in each image indicates the path covered by the metacarpus. Selected components of the setup are labeled with numbers for display purposes (for more details on the setup and the behavioral task, see Fig. 1). B, Reconstructed RtG trajectories of left-paw movements for each animal. Trajectories of successful movements are shown, separated for each animal. Scale bar: both directions, 10 mm. C, Speed profile reconstruction from a successful RtG movement. Speed peaks exceeding the mean speed (horizontal blue line) are used to compute the movement smoothness (red triangles). D, Distribution of the movement distance. Histogram (bin size = 10) represents the absolute frequency distribution for the distances (arc length) covered by the paw to reach the chocolate pellet and eat it. Vertical line indicates the median value. Shaded curve indicates the density distribution. Lines of the rug plots (bottom) indicate the raw distribution for each movement. E, Distribution of the movement duration. Histogram (bin size = 10) represents the absolute frequency distribution for the movement durations. Vertical line indicates the median value. Shaded curve indicates the density distribution. Lines of the rug plots (bottom) indicate the raw distribution for each movement. F, Distribution of the number of speed peaks. Histogram (bin size = 10) represents the absolute frequency distribution for the speed peaks. Vertical line indicates the median value. Shaded curve indicates the density distribution. Lines of the rug plots (bottom) indicate the raw distribution for each movement (the speed peaks being computed as natural numbers, overlap frequently in the rug plot).