Fig. 1.

DTI FA whole-brain color map of an experimental subject. In the left, an axial-oblique (at the AC–PC plane) section. The white box in left prefrontal white matter (PFWM) indicates the boundaries of a 3-mm deep 9 × 9-mm² slab across which FA values were sampled and averaged in postprocessing. A similar average was obtained for the right PFWM. In the right, a parasagittal section of the same color map depicts the position of the four parallel prefrontal white-matter slabs (white bars) located at the level of the AC–PC plane (C), 6 mm below (D), and 6 (B) and 9 (A) mm above. Left and right PFWM FA averages were obtained at each level