The Formation of Neural Connections II: Dendritic Development and the Establishment of Synaptic Connections
As noted in Chapter 6, the initial outgrowth of both axons and dendrites is apparently determined by factors that are intrinsic to the neuron. Very shortly after emerging from the cell body, axons reorient themselves based upon the tissue environment, responding exclusively to extrinsic influences. A useful generalization is that dendrites are less sensitive to the tissue environment and that many aspects of dendritic form are determined by factors that are intrinsic to the neurons. As will be seen, however, the relative role of intrinsic versus extrinsic influences in the further elaboration of the dendritic arbor is not clear-cut.
KeywordsTyrosine Retina Radioactive Isotope Norepinephrine Expense
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Elaboration of Dendrites
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