Figure 6
From: Identifying task-relevant spectral signatures of perceptual categorization in the human cortex
Detailed analysis of spectral activity of (a) animals, (b) faces, (c) pseudowords and (d) scrambled images. For this figure we have selected the four categories that contained the most interesting observations, same visualization of activity importance, cluster assignations and the anatomical locations of those clusters for other four categories are available in the Supplementary Materials repository. Leftmost column contains the importance maps extracted from Random Forest models and shows where in time and frequency the important activity is. Second column visualizes the four largest (by the number of recording sites) clusters of activity patterns inside those spectrotemporal regions that are deemed important. The numbers in the top right corner of each cluster’s activity pattern show the average predictive power (F1 score) of the probes in that cluster and proportion of polypredictive locations that exhibited this particular pattern of activity. Note how every cluster has a designated color: green, blue, red or black. This color of the cluster matches the color of MNI location markers in the last two columns, that show sagittal and dorsal views of the brain. White markers show the probes that have predictive power, but their activity pattern does not belong to any of the four major clusters.
