Figure 3.

Demarcation of the region of interest around the arcuate fasciculus in the right hemisphere. The lower row presents axial color fibre orientation maps from a single subject (Talairach z = 39–42). The standard color coding for fiber orientation is used (red: lateral-to-lateral; green: anterior-posteriorly or vice versa; blue: superior-inferiorly or vice versa). Red arrows indicate the extension of the homologues of the arcuate fasciculus. According to this color fiber orientation map, a region of interest (encircled in red) is defined in the fractional anisotropy image (upper row).