Author response image 1. Correlation between mean Voxel Number and resulting mean Decoding Accuracy (shown for each ROI (N=13) and each of the three pair-wise comparisons for the Plan-Epoch).

Pearson correlation between Voxel Number and Hand Plan Epoch decoding accuracies (red diamond symbols): r²=0.108, p=0.272; Pearson Correlation between Voxel Number and Tool Plan Epoch decoding accuracies (blue square symbols): r²=0.025, p=0.602; Pearson Correlation between Voxel Number and Across-Effector Plan Epoch decoding accuracies (purple triangle symbols): r²=0.026, p=0.598.