Fig. 4.

A and B: gains of roll component of the eye counter-rotation evoked by in-phase (suppression, ■) or out-of-phase (enhancement, □) rotation of the monkey and the visual surround, tested at different frequencies (A) and different peak velocities (B). C and D: gains of the yaw (●, ○), and pitch (▲, ▵) eye counter-rotation evoked by in-phase (suppression, ●, ▲) or out-of-phase (enhancement, ○, □) rotation of the monkey and the visual surround tested at different frequencies (C) and peak velocities (D).