Fig. 4: In both spiking and LFP activity, one mode is dominantly predictive of behavior.
a Joint angle prediction accuracy statistics are shown for the members of the mode clusters in spiking network activity in the sample session shown in Fig. 3. Colors represent the colored clusters in Fig. 3. The yellow cluster termed predictive mode has significantly higher prediction accuracy than every other cluster (P < 8.1 × 10−28, Ns > 97 yellow cluster members, one-sided Wilcoxon rank sum test). The line inside boxes shows median, box edges represent the 25th and 75th percentiles, whiskers show the minimum and maximum values excluding outliers and red crosses indicate the outliers. Outliers are the points that are >1.5 times the box size away from the beginning and end of the box. b Similar to (a) for LFP network activity, where the brown cluster (predictive mode) has significantly higher prediction accuracy than every other cluster (P < 1.4 × 10−4, Ns > 99 brown cluster members, one-sided Wilcoxon rank sum test). c In each monkey, among all principal modes in spiking activity, the prediction accuracy of one of them (termed predictive mode) is significantly better than that of the second best principal mode shown by black box plots (yellow vs. black). The same result holds for LFP activity, and its predictive mode and second best principal mode (brown vs. black). Significance is shown by asterisks (P < 1.8 × 10−20, Ns = 35 and 20 cross-validation folds for Monkeys J and C, one-sided Wilcoxon signed-rank test). d Boxplot of the prediction power (PP) of mode clusters in predicting spiking activity. Higher prediction power indicates better one-step-ahead prediction of spiking activity. The same predictive mode that dominantly predicted behavior had the best one-step-ahead prediction of spiking activity (yellow mode cluster, P < 9.9 × 10−17, Ns > 97 cluster members, one-sided Wilcoxon rank sum test). e Similar to (d) but for the correlation coefficient (CC) of mode clusters in one-step-ahead prediction of LFP. The same predictive mode cluster that dominantly predicted behavior had the best one-step-ahead prediction of LFP activity (brown mode cluster, P < 3.5 × 10−11, Ns > 99 cluster members, one-sided Wilcoxon rank sum test). Source data are provided as a Source Data file.
