Fig 1. Schema of the MR imaging measurements. A, A sagittal T1-weighted inversion-recovery image shows the AC area (dotted circle and arrow) in a control subject. The corpus callosum (CC), fornix (f), and mamillary body (m) are identified. B, A coronal thin-sectional T2-weighted image shows the AC (a), the SI (i), the diagonal gyrus (d), and the ventral pallidum (v). AC (bidirectional arrow) and the SI thicknesses (arrows) are depicted. LV indicates left ventricle.