Fig. 2: Differential spatial distribution of speech representations.

A Locations of channels significantly correlated with each representation uniquely (red—articulatory, green—acoustic, blue—semantic) or with overlapping representations (colors are disseminated in the Venn diagram). Smaller gray dots represent non-significant channels. B Total number of significant channels for each representation and for the overlap between representations. C Percentage of significant channels for each representation, separated by hemisphere. D The Euclidean distance between each significant channel and a centroid for each representation, calculated per hemisphere and presented in boxplots. In the left hemisphere, there were n = 83 articulatory, n = 76 acoustic and n = 67 semantic significant channels. In the right hemisphere, there were n = 29 articulatory, n = 35 acoustic and n = 48 semantic significant channels. The horizontal gray line represents the median distance in each category. The error bars represent the range of distances within 1.5 times the interquartile range from the first and third quartiles. Significant differences between categories were tested using two-sided Mann–Whitney U tests (***p < 0.001, *p  < 0.05, Bonferroni-corrected).