This module briefly summarizes the developmental process of the human brain, describing the origins of the lobes and functions of various cortical and subcortical regions. It seems quite amazing that a structure appearing as simple as the neural plate develops into the most complex system of the human body. Let's explore the divisions of the neural tube. The neural tube originates from a thickened ectoderm- thus forming the neural plate.
Fusion takes place and expansion of the future cerebral cortex begins.
Following the fusion process at approximately the fourth week, closure of the rostral and caudal regions take place. The first main divisions by this new nervous system result in the forebrain, midbrain and hindbrain. Further central nervous system subdivisions occur that further distinguishes the forebrain, midbrain and hindbrain structures. At approximately the fifth week of gestation, the forebrain subdivides into two separate regions known as the telencephalon and diencephalon. The midbrain, or mesencephalon, does not subdivide, however the hindbrain region divides into two structures- the metencephalon and myelencephalon.