Summary of the population responses to random-dot motion with different speeds in areas 17 and 18.

<p>(A) Angular differences between the fitted orientations of differential motion-axis maps and the motion axes of the moving-dot stimuli were plotted against speed. The red dotted curves represent the quadratic polynomial fits. (B) Angular differences between the fitted directions of differential direction maps and the moving directions of the random-dot stimuli. Results were calculated through all speeds tested and averaged across 5 cats studied using intrinsic optical imaging. Error bars represent SEM.