Figure 1.

Task and functional similarities of PRR and PMd. A, Each monkey performed a planned-reach/saccade task, in which he held a central illuminated fixation spot with his hand and eyes as a peripheral target appeared and disappeared. After a planning period, the fixation spot disappeared, and he made either a reach or saccade to the remembered target. B, Recorded areas. Dot size corresponds to the number of cells (single and multiunit) identified in each region. C, Summary of ensemble tuning properties for each area. Top row, PMd chambers. Bottom row, PRR chambers. Left, Planning period. Right, Movement period. Each bar represents the percentage of cells tuned for ipsi-saccades, contra-saccades, ipsi-reaches, and contra-reaches, in that order, combined for both monkeys.