Nodal degree of the group averaged networks at the minimum density of 60%.

<p>(I,II,III) In the 3-D network visualizations, both nodal color and size illustrate (normalized) degree. (IA–E, IIA–E, IIIA-E) Nodes that were removed by the employed elimination strategy are shown in gray. In all networks, degree was normalized to the interval [0 (dark blue) – 1 (dark red)] and split up into four distinct ranges; only nodes with normalized degree in the respective range are color-coded. (IV) Bar charts illustrate the proportion of nodes in the respective degree intervals relative to the total number of nodes in the networks. Numbers at the bottom of the bars are node counts for the R = resting state, S = speech production, and Syl = syllable production networks in the corresponding intervals. The 3-D networks were visualized with the BrainNet Viewer (<a href="http://www.nitrc.org/projects/bnv/" target="_blank">http://www.nitrc.org/projects/bnv/</a>). Abbreviations: 1 = area 1; 3a/3b = areas 3a/3b; 44 = area 44; 45 = area 45; 4a/4p = anterior/posterior part of area 4; 5Ci = area 5Ci; 5M = area 5M; 6 = area 6; 7A/7P/7PC = area 7A/7P/7PC; 17 = area 17; 18 = area 18; AmCM = subdivision CM of the amygdala; Cbl-V/VIv/IX/IXv = cerebellar lobules V/VIv/IX/IXv; Cd = caudate nucleus; Cu = cuneus; FG = fusiform gyrus; Gpe = external segment of globus pallidus; hIP1-3 = areas hIP1-3; HippFD/SUB = hippocampal subdivisions FD/SUB; hOC4v/hOC5v = ventral parts of areas hOC4/hOC5; IL = insula lobe; IOG/MOG/SOG = inferior/middle/superior occipital gyrus; LG = lingual gyrus; MCC/PCC = middle/posterior cingulate cortex; mFG = medial frontal gyrus; MFG = middle frontal gyrus; MTG = middle temporal gyrus; OP1-4 = operculum; PF/PFm/PFop/PFt/PGa/PGp = areas PF/PFm/PFop/PFt/PGa/PGp in the inferior parietal cortex; Put = putamen; SFG = superior frontal gyrus; TE1.1–3.0 = areas TE1.1–3.0; THp = parietal part of the thalamus. All connectivity matrices are publicly available at <a href="http://figshare.com/articles/The_Functional_Connectome_of_Speech_Control/1431873" target="_blank">http://figshare.com/articles/The_Functional_Connectome_of_Speech_Control/1431873</a>; the codes used to transform the fMRI data to networks can be found at <a href="http://research.mssm.edu/simonyanlab/analytical-tools/" target="_blank">http://research.mssm.edu/simonyanlab/analytical-tools/</a>.