PSYB65H3 Lecture : Chapter13.docx
Document Summary
Early in embryonic life ( approx 3 weeks after conception), the neural plate forms. Neural plate: a patch of cells on the dorsal surface of the embryo that becomes the. It is formed from the ectoderm, which is the outermost 3 layers of cells of the early embryo, which also form the skin. Stem cells: pluripotent cells of the neural plate and dorsal ectoderm, which have the potential to develop into any type of cell in the nervous system. B/w the third and fifth months of gestation, rapid cell proliferation (rapid dividing) and neural migration are the dominant event. By day 40, there are three prominent bumps on the anterior portion of the neural tube, these bumps eventually form the. There are waves of proliferation and migration in the developing cns. Cell differentiation is essentially complete at birth; axons and dendrites must get to their appropriate targets and make functional synaptic connections.
