PSYC 211 Chapter 3.2: 3.2
3 Jun 2016
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Document Summary
The central nervous system begins early in embryonic life as a hollow tube and maintains this basic shape even after it is fully developed. During development, parts of it elongate, pockets and folds form, and the tissue around the tube thickens until the brain reaches its final form. The rostral chamber, or forebrain, divides into three separate parts which become the two lateral ventricles and the third ventricle. The region around the lateral ventricles becomes the telencephalon. The region around the third ventricle becomes the diencephalon. In its final form, the chamber inside the midbrain becomes narrow, forming the cerebral aqueduct. Two structures develop in the hindbrain, the metencephalon and the myelencephalon. Cortex means bark and the cerebral cortex, approx. Corrected for body size, humans have the largest cortices. The next wave of cells passes through the first layer to form the next, and so on, until all six layers are laid down.
