Effects of stimulation frequency on ipsilateral saccades. The amplitude (A), peak velocity (B), latency (C), and duration (D) of evoked saccades are documented for 3 sites: b66 (100 ms, 2T = 60 μA), i16 (200 ms, 2T = 50 μA), and m51 (120 ms, 2.5T = 35 μA). Means and SE are represented for each tested stimulation frequency. Filled symbols and solid lines, horizontal component; open symbols and dashed lines, vertical component.