question. Instead, we might ask, what else is achieved in neural tissue by the mix of activity-dependent and position-dependent factors that select and group synaptic contacts when these factors coexist at particular developmental times? Purves et al. (1992) have suggested that some of the columns that have been described in cortex are “by-products” of synaptic development. If so, what is the product?
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7 Evolution of Columns, Modules, and Domains in the Neocortex of Primates--Jon H. Kaas ."
In the Light of Evolution: Volume VI: Brain and Behavior . Washington, DC: The National Academies Press,
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