Figure 3.

Structural connections between voice- and face-sensitive areas as found with probabilistic fiber tracking. Results of a single, representative participant's dMRI are shown as connectivity distribution. Probabilistic tractography was done in both directions: from the visual FFA as seed region to the three target regions in the STS and vice versa from the three seed regions in the STS to the FFA as target region. Seed and target regions were localized with a functional localizer and are displayed as spheres with a radius of 5 mm (yellow, FFA; blue, anterior part of the STS; red, middle part of the STS; green, posterior part of the STS). The structural connections between FFA and STS are colored correspondingly to their seed and target regions in the STS. The connections are displayed from different views: right frontal (A), top (B), and right side (C), plus a detailed view (D). As anatomical landmarks, the inferior longitudinal fasciculus (ILF) is shown in gray (B–D) and the posterior part of the arcuate fasciculus (pAF) is shown in black (C, D) (Catani et al., 2003, 2005; Catani and Thiebaut de Schotten, 2008). Close to the FFA, the connecting pathways follow the posterior part of the arcuate fasciculus before taking a turn to follow the inferior longitudinal fasciculus and reach the STS regions.