FIG 2. Schematic representation of the rostrocaudal location and extent of the major landmarks relative to the limen insula (set at 0) used to define the PCA. Numbers on the left (mean distance in millimeters ± SD) were calculated from control histologic cases (23 temporal lobes) and on the right from the MR imaging control group (46 temporal lobes). The values between arrows depict the mean (± 1 SD) distances between the rostro-caudal limits of the PCA, the amygdaloid complex (A), and the hippocampus (HC).