 The work we shall discuss was done in awake behaving macaque monkeys. Visual area MT in the monkey brain (called V5 in humans) plays an important role in the visual experience of motion. MT is taken to lie in the dorsal visual stream  (figure 1).  Lesions that disrupt MT are known to cause akinetopsia, the inability to see motion. One patient with an MT (V5) lesion reported the following phenomenology: “people were suddenly here or there but I have not seen them moving” (Zihl, Von Cramon, &amp; Mai 1983: 315). MT processing looks to be necessary for normal visual motion experience. Furthermore, MT neurons represent (carry information regarding) the direction of motion of visible stimuli: MT neurons are tuned for motion in specific directions with the highest firing rate for a specific direction of motion (for other functions and responses of MT, see Born &amp; Bradley 2005). By placing motion stimuli in a neuron’s receptive field, scientists can map its tuning: