PSYC 2410 Study Guide - Final Guide: Transitional Fossil, Strange Behaviour, Neurotrophin-3

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Embryotic development -> postnatal childhood development -> adulthood a fixed organ. Cns continues to change throughout entire life -> brain plasticity. After formation cells need to: differentiate, migrate to the appropriate location, establish functional relations with other cells. Totipotent: early embryonic cells, can differentiate in any cell type of the body. Cells can still become many, but not all, cell types. Multipotent: cells that can develop into multiple cell types within a class of cells. Unipotent: cells that can only complete their differentiation into one cell type. Stem cells: two properties: unlimited divisions without differentiation, potential to differentiate into different cell types. Embrypnic development of the cns: induction of the neural plate, neural proliferation, migration and aggregation, axon growth and synapse formation, neuron death and synapse rearrangement. Neural tube, central canal + neural crest. Regulated by chemical signals from the floor plate (along ventral surface) and roof plate (dorsal surface of the neural tube)