Figure 1.

Experiment setup. A, Animals sat facing a frontoparallel workspace looking at and touching a central target while preparing to reach for a peripheral target. B, Hand trajectories for monkey H, center-out delayed reach task. C, Trajectories for monkey L, grid task. D, Multiple waveforms on one electrode. Blue waveform sorted as very good isolation. E, Example of mean firing rate for repeated reaches to the same target for monkey H. Red line denotes linear regression fit. F, Example of tuning curve for monkey H split into first half (blue) and last half (magenta) of trials. Cosine fits also shown with PD denoted by line. Error bars denote SE. (No significant shift.)