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.
Cellular mechanisms of neuronal development1. NeurogenesisThe mitotic division of non-neuronal cells to produce neurons2. Cell migrationThe movement of nerve cells or their precursors to establish distinct neuronal populations3. DifferentiationCells become distinct types of neurons4. SynaptogenesisThe establishment of synaptic connections between axons and dendrites5. Neuronal deathThe selective death of many neurons6. Synapse rearrangementThe refinement of synaptic connections
This preview has intentionally blurred sections.
Sign up to view the full version.
NeurogenesisCells 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