FIGURE 2.

The superior longitudinal fasciculus (SLF). The SLF, pink and purple tracts on tractography A-D and depicted with and without red lines on dissection E-H, arises within the middle and posterior thirds of the MTG, and to a lesser extent from the anterior temporal pole. The fibers travel craniocaudally then curve 180° at the level of the angular gyrus to course anteriorly toward the frontal lobe, curving around the operculum (*). SLF fibers then diverge at the posterior extent of the frontal lobe and terminate in the posterior portions of the superior, middle, and inferior frontal gyri. In some subjects, fibers terminated at different regions of the operculum. MTG, middle temporal gyrus; ITG, inferior temporal gyrus; STG, superior temporal gyrus; TP, temporal pole; IFG, inferior frontal gyrus; MFG, middle frontal gyrus; SFG, superior frontal gyrus.