Figure 2 : Changes in cortical activity during learning. A.The sagittal view (top left) shows the approximate positions in Talairach space of the slices shown in B and C. In red are the approximate locations of the shown slices (31 and 39). Data shown is averaged across four subjects. B. Axial views of two relevant slices illustrating: (1) the main regions of training-dependent cortical activation in the first run (the naive stage). The arrow points to the MT complex with the peak activation at -42, -70, -6.; and (2) activation in the superior colliculus (Talairach coordinates 0, -30,-6). C. Axial views of two slices illustrating the main regions of training-dependent cortical activation in the last run (the- trained stage). The arrow indicates the area of activation corresponding to the MT complex (approximate Talairach coordinates of the peak activations -44, -66, -6).