FIGURE 4.

Systematic and gradual variation of laminar structure across areas of the parahippocampal trend in the human prefrontal cortex: Anterior cingulate and medial prefrontal areas. (A,B), Medial (A) and lateral (B) views of the left hemisphere from the brain (case HCD): red lines show the planes of separation of coronal slabs; black and white arrows indicate laminar differentiation along the parahippocampal trend. (C–G), Micrographs of the anterior cingulate and medial prefrontal cortex in Nissl stained sections at the levels indicated in (A); the areas according to the Atlas of von Economo and Koskinas (1925/2008) and the cortical type are indicated below each micrograph; see the text for description of laminar features. S1, S2, S3, S4, S5, indicate coronal slabs from anterior to posterior; WM, white matter. Roman numerals indicate cortical layers. Calibration bar in (G) applies to (C–G).