Figure 3.

PSTHs are shown for two example MT neurons. A, This cell strongly prefers approaching motion in depth, and shows phasic responses at the stimulus temporal frequency. The upper four PSTHs correspond to approaching motion having 1 cycle, 3 cycles, 5 cycles, or 7 cycles of disparity ramp per stimulus. The lower four PSTHs correspond to receding motion. Gray lines represent the disparity ramp stimulus. B, This cell prefers receding motion in depth, and has little temporal modulation at the stimulus frequency.