Fig. 4

(a) – Percentage ratio of NeuN-immunoreactivity coefficient in the cortical plate of calcarine sulcus and parietooccipital sulcus. (b) – Percentage ratio of NeuN-immunoreactivity coefficient in the subplate under calcarine sulcus and parietooccipital sulcus. (с) – NeuN-immunoreactivity coefficient in early fetal (ef), middle fetal (mf) and late fetal (lf) periods. Significant differences between sulci are marked by square brackets and asterisks (**p = 0.005036, ***p = 0.000001). (d) – Boxplots and multiple comparison for ratio of the NeuN-immunoreactivity coefficient in the cortical plate of calcarine sulcus and parietooccipital sulcus. (e) – Boxplots and multiple comparison for ratio of the NeuN-immunoreactivity coefficient in the subplate of calcarine sulcus and parietooccipital sulcus. Comparable stages: provisional sulci; the parietooccipital sulcus smoothing stage (Pos-); two sulci, when both sulci exist; the calcarine sulcus smoothing stage (Cas-). Significant differences between stages are marked by square brackets and asterisks or presented in the table to the right of the bosxplots. (f) –Scheme of the distribution of NeuN-immunoreactive cells in the cortical plate at different stages of fetal development, Cas - calcarine sulcus, Pos - parietooccipital sulcus