Figure 3.

Target location and saccade order, but not target color, can be decoded from LPFC ensembles. (A) Two sample target configurations with saccade frequency matrices from two subjects. Targets at unique locations were arbitrarily assigned a letter for analysis. The matrices show the proportion of trials within a block that each target was selected first, second, etc. These example blocks show strong sequencing behavior, with high frequencies on the main diagonal. (B) Posterior probabilities calculated for each of six target selections, across 40 trials from the same blocks shown in A. Top and middle panels show posterior probabilities of target locations and saccade orders from both subjects, and the bottom panel shows target color. Dotted lines indicate the onset time of the target configurations, and gray line indicates the chance level. The common saccade order was defined by the sorted saccade frequencies in A. Color labels indicate different targets or target colors. (C) The decoding performance during the hold target epoch for target location (pink circles), saccade order (blue circles) and target color (empty circles) decoders, as a function of SI in each block. Person correlation, ***p < 0.001. Left panel: subject R (n = 90 blocks). Right panel: subject Q (n = 59 blocks).