When does the human brain begin to form during pregnancy?

The formation of the human brain begins around 18 days after conception. This early stage in embryonic development marks the beginning of the neural plate formation, which is the precursor to the brain and spinal cord. During this period, the embryonic tissue begins to differentiate into nervous tissue that will later develop into various structures of the central nervous system.

Around this time, the process of neurulation occurs, where the neural plate folds to form the neural tube, ultimately giving rise to the brain and spinal cord. This marks a crucial milestone in developing the nervous system and sets the foundation for the brain's complex structures and functions that will emerge later in fetal development.

The timing of neural development is critical, as it can impact future cognitive and physical function, making this period particularly significant in the context of early childhood development and special education.