DTI-based visualization of interhemispheric corpus callosum fibers (A) divided into seven sectors (prefrontal, frontal, premotor, motor, sensory, parietal, occipital) and intrahemispheric cingulate fibers (B) in each cerebral hemisphere divided into three sectors (superior, posterior, and inferior bundles). The mean (±SE) for FA, longitudinal (λl), and transverse (λt) diffusivity for each fiber sector and group (control men, alcoholic men) is shown.