Fig. 7.

Pattern of results predicted by each hypothesis for a range of target velocities. Suppose microstimulation injects an artificial signal corresponding to slow upward and rightward motion, and four different visual target velocities are presented (up, down, left, and right) (A). B–E, Expected results for each possible mechanism. Pursuit velocity or saccadic target velocity compensation on nonstimulated trials for each visual target velocity are plotted as open circles, whereas stimulated trials for the same target velocities are plotted asfilled circles and connected to the corresponding nonstimulated data point.