Fig. 9.

Vector summation patterns for pursuit (A) and saccadic target velocity compensation (B) at two different microstimulation sites. Conventions are similar to those in Figure 8. Insets, Receptive field locations and preferred directions for each site (A: receptive field position, 30° to the left, 10° down; receptive field diameter, 30°; preferred direction, 150°; preferred speed, 30°/sec; B: receptive field position, −1° horizontally, 4° vertically; receptive field diameter, 7°; preferred direction, 225°; preferred speed, 15°/sec). For the experiment shown in A, the target directions were 60, 150, 240, and 330°, and the target speeds were 5, 10, 15, 20, 25, and 30°/sec. For the experiment shown in B, the target directions were 45, 135, 225, and 315°. Target speeds were 0 (step trials), 5, 15, and 25°/sec. For both sites, the current level was 40 μA.