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Lecture6_revised - Psychology 110 Biological Psychology...

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Psychology 110: Biological Psychology Lecture 6: Development and plasticity
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Recap of course so far we’ve seen how neurons generate electrical signals and how these electrical signals are transmitted through the nervous system we’ve explored the chemical component of neuronal transmission, the synapse. we’ve looked at some of the techniques available to study the workings of the nervous system. over the next couple of lectures we’re going to explore how the nervous system changes as we grow and learn.
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Cellular mechanisms of neuronal development 1. Neurogenesis The mitotic division of non-neuronal cells to produce neurons 2. Cell migration The movement of nerve cells or their precursors to establish distinct neuronal populations 3. Differentiation Cells become distinct types of neurons 4. Synaptogenesis The establishment of synaptic connections between axons and dendrites 5. Neuronal death The selective death of many neurons 6. Synapse rearrangement The refinement of synaptic connections
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Neurogenesis Cells of the inner layer of the neural tube divide to form a layer of cells called the ventricular zone. The cells continue to divide to form daughter cells. Eventually daughter cells leave this area and become neurons. Neurons themselves do not divide. ~22 days old
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