Bar graphs summarizing the pursuit behavior of controls (CON) and all the patient groups. Target velocity was 20°/s. In all graphs, black and grey bars show responses to horizontal and vertical targets respectively. Error bars show SEs across subjects within each group. Asterisks indicate effects that were statistically significant relative to controls (P < 0.05 ANOVA, Tukey post hoc). Double asterisks indicate P < 0.005 relative to controls. (A) Smooth pursuit latencies, (B) Initial eye acceleration of smooth pursuit, (C) Mean gain of smooth pursuit, (D) Peak gain of smooth pursuit.