Molecular marker expression in medial occipital cortex at PCW15. (a). A Nissl-stained section showing the lamination of the cortex near the calcarine figure (CF). (b-i). Expression patterns of PAX6 (b), TBR2 (c), VIM (d), GRIK2 (e), SATB2 (f), SOX2 (g), FABP7 (h) and ENC1 (i). Note that a dense zone of TBR2 expression at the border between SZi and VZ is termed deep SZ zone (SZd) or border zone (BZ). The thickness ratio of SZo to VZ is about 3:1. SG, subpial granular zone; MZ, marginal zone; CP, cortical plate; SP, subplate; IZ, intermediate zone; OF, outer fiber zone; SZ, subventricular zone; SZo and SZi, outer and inner SZ; VZ, ventricular zone; LV, lateral ventricle. These terms apply to main text and all related figures below. Scale bar: 400 μm in (i) for all panels.