Prenatal ontogenesis of the human brain cortex temporal area

: Prenatal ontogenesis of temporal areas of the human cortex was studied. In the fetal cortex at the gestational age of 16-18 weeks three zones can be distinguished: marginal zone (eI layer), cortex plate and subplate. At 20-26 weeks cortex plate is divided into following layers: eII, eIII, eIV, eV and eVI, with "efferent" complex of layers being wider than "associative" one. The subplate neurons are eliminated in the fetus at 27-33 weeks, when "associative" complex composes over 50 per cent of the cortex thickness. The subplate has been identified by positive correlation between layer eII and the upper subplate layer spu cell density.