Figure 7.
Aggregate population tuning curves for the post-movement epoch in experiment 1 (a) (number of trials for each fixation position: left, n = 8368; center, n = 9090; right, n = 8485) and experiment 2 (b) (number of trials for each rotation position: left, n = 5943; center, n = 13, 400; right, n = 8233). In a, firing rate, normalized for each neuron, rotated so that contralateral targets were positive, and averaged across the population, is plotted against either the retinocentric or nonretinocentric target position. Blue curves represent movements that began 10° left of center, red curves represent those beginning at the central fixation point, and green curves represent those beginning 10° right of center. Colored arrows at the bottom of each plot indicate the y = 1 intercept for each curve. In b, firing rate, normalized for each neuron, rotated so that contralateral targets were positive, and averaged across the population, is plotted against either egocentric or allocentric target position. Blue curves represent trials during which the subject was rotated 20° to the left, red curves represent those during which the subject was centered, and green curves represent those during which the subject was rotated 20° to the right. Colored arrows at the bottom of each frame indicate the y = 1 intercept for each curve.