The article discusses the complex processes of brain development in humans, beginning in the third gestational week and continuing through late adolescence and beyond. It outlines the stages of brain development, from the molecular events of gene expression to environmental influences, emphasizing the interaction between these factors. The development of the human brain involves the differentiation of neural progenitor cells, the formation of the neural tube, and the subsequent development of the neocortex and other brain structures. The article highlights the role of genes in brain development, the formation of the neural tube, and the processes of neural patterning, migration, and differentiation. It also discusses the formation of the primary brain vesicles and the subsequent subdivision into secondary vesicles. The article describes the development of the neocortex, including the formation of cortical layers and the role of molecular signals in determining the identity of different brain areas. It also covers the processes of neuron production, migration, and differentiation, as well as the role of myelination in the development of white matter. The article concludes with a discussion of the importance of experience in shaping brain development and the ongoing processes that continue throughout the lifespan.The article discusses the complex processes of brain development in humans, beginning in the third gestational week and continuing through late adolescence and beyond. It outlines the stages of brain development, from the molecular events of gene expression to environmental influences, emphasizing the interaction between these factors. The development of the human brain involves the differentiation of neural progenitor cells, the formation of the neural tube, and the subsequent development of the neocortex and other brain structures. The article highlights the role of genes in brain development, the formation of the neural tube, and the processes of neural patterning, migration, and differentiation. It also discusses the formation of the primary brain vesicles and the subsequent subdivision into secondary vesicles. The article describes the development of the neocortex, including the formation of cortical layers and the role of molecular signals in determining the identity of different brain areas. It also covers the processes of neuron production, migration, and differentiation, as well as the role of myelination in the development of white matter. The article concludes with a discussion of the importance of experience in shaping brain development and the ongoing processes that continue throughout the lifespan.