Blue represents eventual leftward reaches, red indicates eventual rightward reaches. (A and B) Responses of example units, dataset J2-S. Thick traces, mean; thin traces, s.e.m, Maze, maze onset. Time in ms. Selectivity for left vs right movements was common, and responses were almost always similar for forced and free reaches (A). Less commonly, forced and free evoked somewhat different responses (B). (C) Schematic of decoder. Each dot represents neural state in a window of time on a single trial. (D–F) Decoded choice plots for forced-choice trials, generated by leave-one-out cross-validation. Percentages show fraction correct classification. Datasets J2-T (D), J2-S (E), N1-S (F). Small dots are at last decoded time point. (G–I) Decoded choice plots for free-choice trials (saturated colors) with forced-choice trials shown for context (faded colors). Datasets same as D–F. (J–L) Cross-validated decoded choice at final point for forced-choice trials. Datasets same as D–F.