Figure 1.

Experimental design. (A) Schematic of the stimulus array. Six evenly spaced fixation LEDs (F, between −15° and 15°), were aligned approximately along the axis of the evoked saccades. Two target LEDs (T) were located to the left and right of the array of fixation LEDs, along the same axis, at about 18° to the left and right of the midline. (B) Schematic of the temporal sequence of events in each trial. (C) Schematic of the microstimulation protocol. Pulses were biphasic pulse pairs (cathodal-leading).