FIG. 6.

Neural trajectories for GPFA with p = 15. Each panel corresponds to one of the 15 dimensions of the neural state, which is plotted vs. time. The neural trajectory for one trial comprises one black trace from each panel. Dots indicate time of reach target onset (red), go cue (green), and movement onset (blue). Due to differing trial lengths, the traces on the left/right half of each panel are aligned on target/movement onset for clarity. However, the GPFA model was fit using entire trials with no gaps. Note that the polarity of these traces is arbitrary, as long as it is consistent with the polarity of C. Each trajectory corresponds to planning and executing a reach to the target at distance 100 mm and direction 45°. For clarity, only 10 randomly chosen trials with delay periods >400 ms are plotted. Experiment G20040123, q = 61 units.