Micrograph sections of d30 b-CTRL, UL1 and UL4 hCOs immunostained for the neuronal marker DCX. The dashed lines represent the apical surface of the cavities/ventricles. Quantification of the DCX+ area. The area of DCX+ cells was calculated and related to the total area (µm2) of the ventricular structure. Data shown as Z-scores relative to the mean of b-CTRL. Nuclei (blue) are stained with DAPI. 